There is a serious virus calling NKrokerz1.vbs spreading these days.
Mostly its coming through pen drives and other portable media.
It will infect to your computer and wait some time around 2 or 3 hours.
Then it will start to delete files in your computer without a notice excluding your system partition.
Data recovery packages are also failing to recover most of them.
My advice is keep your virus guard definitions up to date and make sure your not allowing to execute autorun.inf files in your portable media.
Its much better to backup your valuable data.
