Well, I did a Google for it and according to Symantec it's a Windows Portable Executable (PE) file infector. Files infected by W32.Jeefo increase in size by 36,352 bytes.
Said to be very low risk.

Symptoms: 1. Memory Usage is High 2. Executables do not launch 3. Multiple instances of svchost.exe launched in the task manager.

Sophos has a detector/removal tool for it here:

http://www.sophos.com/support/disinfection/jeefoa.html
http://www.sophos.com/security/analyses/viruses-and-spyware/w32jeefoa.html

Just ran it on my system, which has been misbehaving lately -- and I was on Rendo a couple times during the virus attacks last week -- but so far all scans keep coming up clean. Not sure if that's good or bad as I still have the problems : Memory usage suddenly going very high, up to 100% of my CPU, and the dreaded low-battery error at startup day before yesterday. Then again it might not have anything to do with a virus, these Dell 8300s have been known to be lemons in disguise.