I was using a program used to split videos named "Power Video Cutter" which I obtained from download.com and scanned for viruses using MS security essentials before installing it when I suddenly received a message from MS security essentials indicating that an exploit was found on my pc: Win32/CVE-2010-0818.gen Category: Exploit Description: This program is dangerous and exploits the computer on which it is run. Recommendation: Remove this software immediately. Microsoft Security Essentials detected programs that may compromise your privacy or damage your computer. You can still access the files that these programs use without removing them (not recommended). To access these files, select the 'Allow' action and click 'Apply actions'. If this option is not available, log on as administrator or ask the local administrator for help. Items: file:C:\video1.wmv Can someone tell me what exactly that virus is and why download.com would make a file that has a virus available for download?