Re-appearing folder.

I was checking the folders and files on my harddrive and noticed a folder with a 7 character name i didn't recognise. The folder showed empty so I tried deleting it but it just re-appeared but with a different 7 character name. I can rename the folder but it makes no difference even if I change the name length. Is this a virus? Please help. Thank you.

What folder? Where? It may be associated with a program you have perhaps.