scan on archive files

system home pre,vista 64 sp1, i ran a scan on archive files and got this…

unable to scan c:program files(x86)\Nero\Nero 7..\root.img

is this a virus

I think that don’t mean virus. Maybe some protection – file in use.

Files that can’t be scanned are just that, not an indication they are suspicious/infected, just unable to be scanned.