Re scanning is use minimal resources selected? If so deselect it.
Couple questions are you using a subscription version of Mcafee or that supplied by a partner ie yopur ISP or say Dell?
Re virus what message does it give to imply you have an issue?
If your copy is a subscription there is a new version 2011 available for download on the Australian server. It has faster scanning and you can exclude files and folders for Custom and scheduled scans. You would need to uninstall reinstall your copy after you make sure your account is active.
f you think you have a virus infection on your PC do one or both of the following :
- Run the free Mcafee Stinger program from http://vil.nai.com/vil/stinger/ -
set it to Report Mode (in Preferences) and post the logs of anything it detects.( set it to very high sensitivity)
- Join the McAfee Getsusp group at https://community.mcafee.com/groups/getsusp30-beta-feedback
Download here the latest version https://community.mcafee.com/thread/32269
Before you use Getsusp, you should go to this document
and download the PDF file explaining what Getsusp is and how it works, and this document
which downloads the installation guide PDF document.
If you want a second opinion, or to be on the safe side, then you can do a scan with the free versions of these tools :