MS has released an out-of-band version of its Malicious Software Removal Tool (MSRT) to remove the Win32/Afcore (Coreflood) malware. Download from:
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=ad724ae0-e72d-4f54-9ab3-75b8eb148356

CCleaner v.  3.06.1433 has been released. Changelog here:
http://www.piriform.com/blog/2011/4/26/ccleaner-v306

Download internally, or from here:
http://www.piriform.com/ccleaner/download

Be sure to uncheck any unwanted add-ons. (Slim build, as usual, is not yet available). No need to uninstall previous versions.