ricver wrote:my system quaranteened the exe update file
Your system ? You mean your antivirus ?
ricver wrote:is it safe to ignore the "known bad file" warning?
Antivirus frequently have false positives. The update file was tested, and it doesn't contain any virus.
If you don't trust me, you can quaranteen the file and test it with another antivirus.
For instance, this website will test the file with several antivirus:
http://www.virustotal.com/