Windows XP service Pack 3 with McAfee Security subscription paid thru late 2010. When I click the scan button, an error message that says the scanner encountered a problem - on-demand scanner can't start. When I go to Tech Support page and run MVT, there is a message that 'McAfee Products can't be found'. Please help solve these problems, and thanks.
3. Launch Windows Explorer and delete all McAfee files in "Program Files" but especially in "C:\Document and Settings\<user>\Application Data" and "C:\Document and Settings\All Users\Application Data". You have to set Windows Explorer to show all hidden files and folders (Tools > Folder Options > View tab). Just delete the McAfee folders even if they are empty in all the "Application Data" folders. Can be more than one! In Vista: C:\Program Files, C:\ProgramData and C:\Users\yourname\AppData\Roaming If you can't find these files don't worry. It just means that MCPR has done its job.
4. Reboot and redownload/reinstall your McAfee products directly from your account at the McAfee web site.