What version of windows?
This can be caused by a virus.
Lift Restrictions - TM, Regedit and CMD (Line 275)http://www.kellys-korner-xp.com/xp_tweaks.htm
Enable the Task Manager (Line 51)(Right Side)
Check your settings here: For XP Pro
Start/Run/gpedit.msc. User Configuration/Administrative Templates/System/Crtl+Alt+Del Options. In the right pane double click Remove Task Manager and enable it.
Also, if you have disabled the Alerter Service, CAD will be disabled. If neither of these are the case and the Task Manager only opens for a few seconds, then closes:
This behavior can be caused by a virus. One of three:http://securityresponse.symantec.com/avcen...pybot.worm.htmlhttp://securityresponse.symantec.com/avcen...firstname.lastname@example.org://securityresponse.symantec.com/avcen....email@example.com
See this article:Taking out the trash
See this article:The Parasite Fight
Have you tried a complete cleaning to see if that helps?
Show all Files & Foldershttp://www.bleepingcomputer.com/forums/ind...showtutorial=62
Try these free tools.
Trendmicro (free virus scan only)http://housecall.trendmicro.com/
Ewido (free Trojan Scan)http://www.ewido.net/en/download/
Adware SE (update after installing)http://www.lavasoftusa.com/software/adaware/
Spybot S&D (update after installing)http://www.download.com/Spybot-Search-Dest...4-10122137.html
Edited by River_Rat, 13 October 2005 - 07:59 PM.