On my start menu, the option "My Computer" suddenly changed to "14v21." It happened yesterday, but I don't know exactly when. I noticed it after visiting irs.gov and downloading a pdf. I was warned that I didn't have the lastest version of adobe reader and was, thus, vulnerable to attacks. However, it could have happened most anytime yesterday. For example, a family member played pogo.com games for hours.
Right now those are my top two suspects: irs.gov and pogo.com, but I really have no idea.
Anyone else ever seen this?

I did a deep system scan with bitdefender...
Two threats were found. Both were in my temporary internet files...
1. ******.SWF.Cxx
2. Trojan.JS.Iframe.AYZ
But that doesn't mean they are related to this strange thing my Start Menu is doing.