"Windows cannot find 'C:\Program Files\AVPersonal\AVWIN.EXE'. You may have typed the name incorectly in the Run dialog, or another open program cannot find a system file. To search for a file, click the Start button, and the click Search."
Soudns like a damaged installation.
Uninstall AntiVir and either
1) reinstall it
2) install AVG click here free
What was the worm?