The problem that I see w/the replies in this thread is that it is ALL good information, very valid stuff. So I'll add mine opine on the subject, if the OP is 100% sure that he was in touch with Microsoft then he should be 100% safe in allowing the 'remote access' help.
Great that he rebuked their offer for McAfee, but considering that he got free help w/other issues you'd have to figure that they (Microsoft) are looking to make a buck somewhere/somehow, they're probably getting the best deal on McAfee now.
btw gals/guys, what AV software comes installed w/windows these days? it used to be Norton's, but as mentioned above there were difficulties w/it (slowed my pc down to a crawl) and so I also had to remove it.
my local provider recommends AVG & SUPERAntiSpyware, both of them are the free versions & they work great. AVG takes about 20 minutes to run, and SAS takes between 3 & 15 minutes to run depending on which scan I select, partial or whole computer.
I like that they're both free, if I paid for either of those then they'd run constantly in 'the background' slowing my pc down, I run then regularly enough.......