"Jpeg", is a reference to a picture file. You may have acquired this on one of the sports pages by clicking on a infected/hostile JPG Photo or Image file. You could have come into contact on Yahoo answers by clicking a link within a question. Read the quote below:
"Summary
Exploit:Win32/MS04028!jpeg is a detection for a specially crafted image file (.JPG) that exploits a vulnerability discussed in Microsoft Security Bulletin MS04-028. The exploit could cause a buffer overrun leading to the execution of arbitrary code.....There are no common symptoms associated with this threat. Alert notifications from installed antivirus software may be the only symptoms."
http://www.microsoft.com/security/portal…
As it is quarantined it can not harm your computer. Allow it to remain quarantined until your AV develops a solution to permanently delete it or try an Online AV scanner and let it attempt to remove it. You can try Eset's Online scanner=========>
http://go.eset.com/us/online-scanner
Good Luck.