Spam Attack-by MS Antivirus?

I looged on yesterday to find all kinds of dire warnings from Microsoft…only I don’t belive it. I noticed my machine running slower, so I had my AVG software conduct a search-it found several trojan horse viruses, whih it removed. The weird thing-the message displays the MS logo-but parts of the message are misspelled. I also found two links on my desktop, that I removed-and they came back.
I some phisher using the MS AV cloak to spread a virus? Obviously, I didn’t trust any of this stuff-it even told me that the software it was pushung couldn’t be guaranteed!

This thread may or may not be relevant: http://boards.straightdope.com/sdmb/showthread.php?t=478792&highlight=Microsoft