Is someone sharing Windows 7 with me?

I'm being stopped again by the Windows security scan that pulls up the 3/22/13 mbar file.

Should I try to delete that file? And should I be running the scan from my desktop?

I am having a Groundhog's Day experience. I delete the mbar file from 3/22. I am asked if I want to delete the file. Yes, I do. It disappears. I go back to the download. The Windows security scan runs. The page containing the mbar file from 3/22 reappears. I do the whole thing over. And over. And over. I can't kill it. It refuses to leave. Why?

I decided to click on "extract," which I found by pure accident. I ended up getting rid of 3/22, only then to have mbar 5/10, 5/11, & 5/12 all on one page, but still stopping me from running the scan once detected by Windows security.

The 5/10. etc. are the dates I ran this scan while working with you -- I think! When I extracted the 3/22/13 mbar file, I had to choose where to put it, so it went into my documents. I thought maybe it would be "out of the way" of the security scan. Not.

All that I see is a manila file envelope that says "mbar." Inside are the same kinds of files that I posted earlier when I couldn't cut & paste the information for you. I still have that problem. I can type the contents of the folder for you if that would be helpful.

I have an HP Pavilion p2-1120 PC. I have chosen not to add on all of the HP "enhancements" and am running regular home premium Windows 7 & IE9.

I got it last summer -- August, I think. Replaced a Dell laptop. What would happen to all of my stuff? I backed up after the computer guy finished with it, but I am wondering if the back-up might also be infected. It would take me a long time to get everything written down, but I am willing to do whatever you think is best.

Lexor flash drive.