I have this exact same problem using ccleaner and spy sweeper together. When I run the ccleaner, spy sweeper pops up that it has quarantined as virtumonde some of the temp files that ccleaner has just been removing. I use four computers, one a brand new laptop like the poster above, and this has happened on EVERY ONE OF THEM. They cannot all have virtumonde. I'm sure this is a false positive, but it is very frustrating nonetheless. Full scans by malwarebytes, superantispyware, and, yes, spy sweeper, are all clean. And there's no way all these computers could have virtumonde; they are showing no popups or other symptoms of virtumonde, the quarantining action only occurs during ccleaner scans, and none of the other security programs pick up a problem (malwarebytes, superantispyware, pest patrol, windows defender, spybot and Trend Micro Officescan corporate.
The files being flagged are three temp files in documents and settings -- application data for Mozilla firefox and for Sun Java. The temp files flagged vary from computer to computer though.
When I used Google Chrome on the older computers, this would constantly happen with Google Chrome files, and so I deleted it thinking it was an incompatibility with Chrome. But I've found it happens with Firefox as well.
I noticed someone posted on here in another thread about a month ago with the Google Chrome problem, but no one at ccleaner or spy sweeper seems to want to test it out.