System volume information

Hi all,

 

As m new to this forum...can anybody help me with the problem

 

I just installed NIS 2012 a couple of weeks ago and now in each drive of my laptop there are two hidden folders being created "system volume information" and "recycle.bin" and while I try to delete those they are not getting deleted.

 

I have scanned with the help of NIS, but shows clean. No viruses.

 

Are these folders viruses??????? if, then what I am supposed to do.

 

Please suggest...

 

Waiting for your valuable suggenstions... eagerly....

 

Thanks in advance