I keep getting popups telling me that "The application or DLL <blahblah>.dll is not a valid Windows image. Please check this against your installation diskette". The programs and DLL files specified are usually different each time, but are (or appear to be) vaild Windows or program DLLs. I've run a scan on my system with McAfee and Malwarebytes, and it checks out clean. I've also done a deep hardware scan on my HDD, and it found no errors. What else can I check to find the problem? OS is WinXP Pro with SP3.