Try another AV, I use Microsoft Security Essentials ( MSE )
http://www.softpedia.com/get/Antivi...
http://www.softpedia.com/progScreen...
http://www.techsupportalert.com/9be...
http://www.techsupportalert.com/bes...
http://lifehacker.com/5401453/stop-...
http://lifehacker.com/5433229/micro...
http://www.techradar.com/reviews/pc...
http://www.cnet.com.au/microsoft-se...
http://www.microsoft.com/security_e...
http://www.microsoft.com/security_e...
System requirements
http://www.microsoft.com/en-us/secu...
Check list for installing Microsoft Security Essentials
http://tinyurl.com/3gtab8l
No cost, no hassle security software for your PC.
I'd agree that McAfee is more problematic than many other security programs, but MSE doesn't provide the same scope of protection as any of the paid-for security suites, so if you need a complete package then look at one of the others - Trend, AVG (full suite), Norton, Kaspersky - all are better than McAfee, especially if it won't even install in the first place.... "I've always been mad, I know I've been mad, like the most of us..." Pink Floyd