What is CIH virus ?

[masterleous]

What is a CIH virus,
some of my friends which don't have an access to internet also cause throw it,
Is it a Windows Virus, than why Microsoft can't delete it, is this virus is for all windows version.............
Thanks.

[Budfred]

It is a NASTY. (http://www.symantec.com/avcenter/kill_cih.html) Check the link for details.