DS roms are immovable and don't exist

Okay, so I download all my DS roms from Romulation and I love it but about a week ago my DS roms broke down and I found it impossible to move them on my CycloDS Evolution. I can't move them to another folder on the computer, I can't copy them, I can't delete them but somehow they still take up space on my computer: about 6 GBs. I was wondering if this was a virus or something. I could spend another 4 hours redownloading on a different computer but i'd like to know how to fix this problem.

sounds like the folder is corrupted, run chkdisk on your hard disk.

NOPE, tried that and it didn't change. I'm at a loss here, I can only hope someone has had the same problem as me.

ok, so for those that might begin experiencing the same problem create a brand new admin account on your computer which you won't mes with and then do the moving and deleting from there