At some stage those XP machines should be upgraded to IE8.
McAfee 6? Partners Portal? What is the name of the software you are talking about please?
Is this Enterprise? If so I will move it.
OK vs.mcafeeasap.com tells me this is McAfee SaaS, not a Home Product, so have moved it there. Hopefully someone will help you soon.
Please let me know the exact error message or possible send me the screen-shot, so that it will be helpful to assist you accordingly.
The exact error is
Internet Explorer Script Error
Error Invalid Character
Do you want to contniue with the script Yes or No.
This is all in a IE pop up window. It shows even if you don't have IE open and about every hour it pops up.
Do you use a proxy server? If yes, please try to delete all cache files on the proxy server against mcafeeasap.com. If you are not using a proxy, then go ahead to delete IE cache files.
I hope this would work.