As I said this could be an indication of your system being infected by a virus designed to kill anti-virus installations.
If you haven't already got this software (freeware), download, install, update and run it and report the findings (it should product a log file).
Objects scanned: 95981
Time elapsed: 33 minute(s), 30 second(s)
Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0
Memory Processes Infected:
(No malicious items detected)
Memory Modules Infected:
(No malicious items detected)
Registry Keys Infected:
(No malicious items detected)
Registry Values Infected:
(No malicious items detected)
Registry Data Items Infected:
(No malicious items detected)
Folders Infected:
(No malicious items detected)
Files Infected:
(No malicious items detected)
as for the rootkits, i cannot seem to get them. i keep getting the message that they are not valid win32 applications.