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Author Topic: Ctrl+Alt+Delete
kendor
I'll Be Home for After Christmas Sales


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Is it an urban legend that the file 'taskmgr.exe' runs the ctrl+alt+delete function in Windows? I can't find that file on any computer yet ctrl+alt+delete works on them. (Windows 98)

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The Phantom Phreak
Deck the Malls


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no, i just closed Taskmgr.exe and CTRL+ALT+DEL still worked, it brings up a menu with all the options to log off etc, but taskmgr doesnt run CTRL+ALT+DEL

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Rhiandmoi
Ding Dong! Merrily on High Definition TV


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Ctrl+alt+delete is just a shortcut. It has to be calling up something, maybe the name of the file you are looking for is misspelled or hidden so it can't be deleted.
What I did, was go onto the run thingy and enter in taskmgr.exe and it called up my task manager. So I think the file is hidden and protected so you can't delete it.

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Mad Jay
Let There Be PCs on Earth


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I always thought Ctrl+alt+delete(among other shortcuts) were handled by the operating system itself. So, there is no single file or program that handles it

I wouldnt want it any other way, too. You dont want a virus to embed itself in the Ctrl+alt+delete function

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Nico Sasha
In between my father's fields;And the citadels of the rule; Lies a no-man's land which I must cross; To find my stolen jewel.

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Bug Muldoon
The "Was on Sale" Song


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quote:
I always thought Ctrl+alt+delete(among other shortcuts) were handled by the operating system itself. So, there is no single file or program that handles it
What do you thing the operating system is ?

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Mad Jay
Let There Be PCs on Earth


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quote:
Originally posted by Bug Muldoon:
quote:
I always thought Ctrl+alt+delete(among other shortcuts) were handled by the operating system itself. So, there is no single file or program that handles it
What do you thing the operating system is ?
[geek programmer mode]
The operating system is, technically, not a program. A program is an entity that tells the operating system what it needs the operating system to do. So, basically a program is running inside the operating system. So, I wouldnt call Windows a program.
[/geek prgrammer mode]

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Nico Sasha
In between my father's fields;And the citadels of the rule; Lies a no-man's land which I must cross; To find my stolen jewel.

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Bug Muldoon
The "Was on Sale" Song


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You can tell I'm sleepy when I make a clumsy attempt to outsmart an expert, fail miserably, and then notice I misspelled "think".

Oh dear.

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All along the untrodden paths of the future, I can see the footprints of an unseen hand.

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kendor
I'll Be Home for After Christmas Sales


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So on one of my computers, Ctrl+Alt+Delete doesn't work anymore. How can I restore it?

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Mad Jay
Let There Be PCs on Earth


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quote:
Originally posted by Bug Muldoon:
You can tell I'm sleepy when I make a clumsy attempt to outsmart an expert, fail miserably, and then notice I misspelled "think".

Oh dear.

I know I should have been clearer. My point was that I dont think there is a single file that handles C-A-D. If I recollect correctly, the C-A-D used to be handled by the BIOS in old DOS machines. They put it in there, primarily because crappy DOS would'nt protect the programs from sending incorrect commands to the hardware, or from freezing DOS itself. So, if a program sent an incorrect command to the hardware, the BIOS will throw the BSOD out, and C-A-D allowed the user to restart the OS. If DOS froze, the user could use C-A-D to bring the BSOD itself and restart OS. I think somewhere along the line, Windows became mature enough to handle C-A-D itself, although I'm not sure when. I think it must be around Windows NT. I'm not sure whether Windows intercepts C-A-D itself or C-A-D goes to the BIOS which routes the command to Windows.

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Nico Sasha
In between my father's fields;And the citadels of the rule; Lies a no-man's land which I must cross; To find my stolen jewel.

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Dogwater
Happy Holly Days


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quote:
So on one of my computers, Ctrl+Alt+Delete doesn't work anymore. How can I restore it?
Well, you can do what I do, and RESTORE it to its basic components. A Craftsman hammer works quite effectively [fish]

Dog--I have nothing to add [Frown] --water

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Mad Jay
Let There Be PCs on Earth


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quote:
Originally posted by kendor:
So on one of my computers, Ctrl+Alt+Delete doesn't work anymore. How can I restore it?

EEP!! Never seen that one.
a) Did you try rebooting?
b) Keyboard problems?? Do each of the keys work individually?

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Nico Sasha
In between my father's fields;And the citadels of the rule; Lies a no-man's land which I must cross; To find my stolen jewel.

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WildaBeast
Let There Be PCs on Earth


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quote:
Originally posted by Mad Jay:
They put it in there, primarily because crappy DOS would'nt protect the programs from sending incorrect commands to the hardware, or from freezing DOS itself. So, if a program sent an incorrect command to the hardware, the BIOS will throw the BSOD out, and C-A-D allowed the user to restart the OS. If DOS froze, the user could use C-A-D to bring the BSOD itself and restart OS.

Actually when IBM first developed the PC, users weren't even supposed to know about C-A-D. It was there, but not documented; it was esentially an easter egg. Dave Bradley, the engineer who wrote the original BIOS, put it there to make his and the other engineers' lives easier, as they had to restart their machines rather frequently as the bugs were still being worked out. At some point, some IBM salesmen got wind of this feature and began telling their customers about it.

This information comes Dr. Bradley himself, who teaches a class at my alma mater.

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"Unseasonable is an odd word to begin with. It sounds like it's describing something that it's impossible to sprinkle pepper on." -- Nonny

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ilwrath
The Red and the Green Stamps


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quote:
If I recollect correctly, the C-A-D used to be handled by the BIOS in old DOS machines. They put it in there, primarily because crappy DOS would'nt protect the programs from sending incorrect commands to the hardware, or from freezing DOS itself. So, if a program sent an incorrect command to the hardware, the BIOS will throw the BSOD out, and C-A-D allowed the user to restart the OS. If DOS froze, the user could use C-A-D to bring the BSOD itself and restart OS. I think somewhere along the line, Windows became mature enough to handle C-A-D itself, although I'm not sure when. I think it must be around Windows NT. I'm not sure whether Windows intercepts C-A-D itself or C-A-D goes to the BIOS which routes the command to Windows.
Oh boy... my knowledge back this far in PC history is a bit hazy, too. (Hey, I was a C64 and then Amiga geek back then!) But I think you're on the right path, Mad Jay. Originally, I believe that C-A-D threw an exception that was caught in the BIOS and rebooted the computer. AFAIK that no longer happens, though. Windows captures it, but uses it as some method to get the OS kernel's attention to certain matters. (such as the famous "Press CTRL-ALT-DELETE to logon" on Windows NT/2000 [and can be re-enabled for XP pro])

IIRC, Linux also captures this key combination, but doesn't really do anything special with it. (Serves some minor functions in certain window managers, I think...)

Anyhow, if Ctrl-Alt-Delete stopped working in Windows.... I'd probably first examine the keyboard, because as far as I know, the section of code that captures C-A-D runs in the kernel and you sure can't load Windows without that! [Smile]

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RoofingGuy
The First USA Noel


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Amiga geeks unite? Why use Ctrl-Alt-Del when Ctrl-Amiga-Amiga works so good for gurus? [Big Grin]
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Mad Jay
Let There Be PCs on Earth


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quote:
Originally posted by WildaBeast:
quote:
Originally posted by Mad Jay:
They put it in there, primarily because crappy DOS would'nt protect the programs from sending incorrect commands to the hardware, or from freezing DOS itself. So, if a program sent an incorrect command to the hardware, the BIOS will throw the BSOD out, and C-A-D allowed the user to restart the OS. If DOS froze, the user could use C-A-D to bring the BSOD itself and restart OS.

Actually when IBM first developed the PC, users weren't even supposed to know about C-A-D. It was there, but not documented; it was esentially an easter egg. Dave Bradley, the engineer who wrote the original BIOS, put it there to make his and the other engineers' lives easier, as they had to restart their machines rather frequently as the bugs were still being worked out. At some point, some IBM salesmen got wind of this feature and began telling their customers about it.

This information comes Dr. Bradley himself, who teaches a class at my alma mater.

Ahh!! I didnt know about that! But didnt the DOS BSOD screen say "Press Ctrl-Alt-Delete" to restart the machine? Was that message there from the beggining or was it added later on?

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Nico Sasha
In between my father's fields;And the citadels of the rule; Lies a no-man's land which I must cross; To find my stolen jewel.

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eakf
The Red and the Green Stamps


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quote:
Originally posted by kendor:
So on one of my computers, Ctrl+Alt+Delete doesn't work anymore. How can I restore it?

Just a thought.. Have you tried running 'taskmgr.exe' from the run command? I.E. Is it possible that this file is corrupt or missing?
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diddy
Markdown, the Herald Angels Sing


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From my windows 2000 Admin classes, I believe that C-A-D is a funtion enitrely unique to Windows. Which lead me to believe that its part of teh operating system and calls up a system prompt of types at different times much like what pressing the start menue button on your keyboard.

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Joseph Z
Xboxing Day


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regarding "So on one of my computers, Ctrl+Alt+Delete doesn't work anymore. How can I restore it?"

Three methods you can do

1) If Microsoft has it, they can explain on restoring the problem.

2) If you pop in your Windows CD and run the bootup, you can use the "repair" method. Be in mind though you will lose your WindowsUpdates and have to do them again.

3) Sick and tired of your computer crashing over and over again, format the hard drive with the Windows CD (OEM Edition). "Install" Petition "/WINNT or /WINDOWS" "Keep petition as it is (Default NTFAT?)" 30 minute format and 1-2 hr install instructions.

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Joseph Z

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Wizard of Yendor
Markdown, the Herald Angels Sing


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In Windows XP it looks like taskmgr.exe is the windows that pops up when you press Ctrl+Alt+Delete, but ending it just closes the window, you can still use Ctrl-Alt-delete to bring it back again.
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Jason Threadslayer
Let There Be PCs on Earth


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Ctrl+Alt+Del is the IBM PC architecture secure attention sequence. In real mode (DOS), it reboots the computer. In protected mode (such as Windows 9x, NT, Linux), the OS can trap the keyboard combination.


On the Mac, it was Ctrl+Power.

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Jason Threadslayer
Let There Be PCs on Earth


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quote:
Originally posted by LoWay:
regarding "So on one of my computers, Ctrl+Alt+Delete doesn't work anymore. How can I restore it?"

Three methods you can do

Read the OP closer -- kendor has Windows 98.

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Kev
We Three Blings


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quote:
Originally posted by Jason Threadshochet:

On the Mac, it was Ctrl+Power.

Ctrl+Command(Apple)+Power, and it still is. Except newer keyboards don't have power buttons so it's the eject button instead.

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Rorgg
I'm Dreaming of a White Sale


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quote:
Originally posted by Jason Threadshochet:
[QB][*]Under OS/2 and Linux, it reboots the computer.

That's the default on most linux distros, but the action to be taken when a ctrl-alt-del is captured can be changed with a text file edit.
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Joseph Z
Xboxing Day


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There's always unplugging the machine to get it to do your own bidding. God I miss the Commodore Days! [Big Grin]

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Joseph Z

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StewPot
I'll Be Home for After Christmas Sales


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http://www.annoyances.org/exec/forum/win98/1068513011
There is a procedure here that might fix your problem... or it might hose your PC for good. The procedure is as follows:

"Maybe a keyboard problem, first try ctrl + alt + Del on the numeric pad. If no luck...Try this: Open the system.ini file with Notepad, and look under the [386Enh] section heading. If it contains the entry "LocalReboot=Off" or "False", change it to "LocalReboot=On" or "True". If it does not contain the entry, add it. Click File menu>Save, then Exit Notepad. Re-boot. Test."

Hope this helps.

Stew"So what did you do to it?"Pot

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fictional lie
I Saw Three Shipments


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quote:
Originally posted by Mad Jay:
quote:
Originally posted by Bug Muldoon:
quote:
I always thought Ctrl+alt+delete(among other shortcuts) were handled by the operating system itself. So, there is no single file or program that handles it
What do you thing the operating system is ?
[geek programmer mode]
The operating system is, technically, not a program. A program is an entity that tells the operating system what it needs the operating system to do. So, basically a program is running inside the operating system. So, I wouldnt call Windows a program.
[/geek prgrammer mode]

Windows is the program that DOS runs. So wouldn't Windows techincally be a program, and DOS would be it's OS?

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Wizard of Yendor
Markdown, the Herald Angels Sing


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That was true (to decreasing degrees) for windows 3.11 95 and 98 but windows XP really is it's own OS. Some important parts of it, like Explorer are just exe files though.
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