For the less tech savvy among us:
My symptoms were that whenever I would search for anything in Google, MSN, or Yahoo, the results would appear as normal, except that all of the links were redirected to bogus spam sites.
Basically, if when your search results are loading you see “220.127.116.11″ in your browser’s status bar, you need to browse to your C:/Windows/system32/wdmaud.sys and delete the file.
It seems the virus is rather old, since the post from the link was from a month ago but then again we all know how long and wide viruses can spread. Only came to know about it from a thread in BeyondUnreal forums. When in doubt, never ever click the “OK” button.