See
www.dougknox.com, Win XP Utilities, Create Emergency Copies of Critical
XP System Utilities. This small VB Program will create backup, usable
copies of Task Manger, Regedit and MSConfig (named Taskmgr1.exe, Regedit.com
and MSConfig1.exe) in a new folder C:\EmergencyUtil. Many virus programs
will intercept these programs, based on their original file name. The
modified file names, allow them to be run. Open Windows Explorer to
C:\EmergencyUtil and double click the application you need. The next
revision will allow you to browse for the folder you want to place the
backups in.
Additionally, see the Win XP Utilities section for Startup Programs Tracker.
This small utility scans your system for startup programs and running
processes. It also allows you to create a log file that can be copied and
pasted into a newsgroup post. The contents of the program window are also
copied to the Windows Clipboard, automatically.
Most likely you have a virus.
