Well, I have similar thoughts about MS products and Mr. Gates. I'd forgive him if he made a $2,000,000 (or more)
donation to OCF but until then

to him!
Brian may have suggestions from the "internal" perspective. He is a Mac man so he'll probably just tell you to get
a computer. I have some experience with nasty PC computer related problems but I won't claim to be expert. If you have not tried this; you might disable your Mcaffee and then re-boot (don't let Mcaffee restart) then see if it works. Also, if you have not scanned for ad-ware with anything except Mcaffee you might want to try downloading one or more other free products (Ad-Aware, AVG, SpywareBlaster) and running them. I have found that NO one product works to rid spy-ware 100% of the time. What you describe happening sounds a lot like that kind of problem.
If you search for those three products be sure you spell them exactly like I have in the post. There are other free products out there and many copycats. I have used all three of the above for a long time with good success. They are also highly regarded free versions (for personal use). Also make sure you are downloading the "free version" not the Free Trial Version. (Not a huge problem they will just tell you to buy when the trial is up.)