Other than this is your machine running fine? Are there items in Quarantine? Open SecurityCenter and click Navigation, then scroll down to Quarantined and Trusted Items and expand those sections.
Try restoring them if there are any.
This has been reported before with XP and I thought it had long ago been fixed.
I suggest uninstalling McAfee via Control Panel
Then run the MCPR cleanup tool which is in a FAQ linked under Useful Links at the top of this page. Or here: http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe
Reboot and reinstall from your online account.
If this doesn't fix it then contact Technical Support, it's free by phone or online chat and linked also under Useful Links.
Unless something is labelled as a PUP (Possibly Unwanted Program) then it can't be trusted and you woiuld have to submit it to the labs for approval as per: https://community.mcafee.com/thread/2016
But as this issue has happened before with other users, some time ago, Technical Support may be of help.
Thread moved provisionally to SecurityCenter.