In case it's a registry prog:
Go to Start > Shutdown, and choose 'Restart the computer in MS-DOS'
At the blinking cursor, type the following commands successively, hitting 'enter' after EACH line:
The Scanreg tool will now proceed to rebuild your registry, which can take some time.
When it finished, type exit or win, followed by hitting 'enter' to return to Windows.
Ctrl-alt-delete will work as well.
You will have refreshed, compacted and repaired your Registry.
Also try running system file checker.