Error deleting file or folder

Not sure if I'm in the right forum or not, so if I should be asking elsewhere, please let me know! I'm new here

I've been trying to delete this folder for some time now, I've researched a lot on the internet but so far I haven't been able to solve it.

I'm trying to delete C:\Documents and Settings\name\Desktop\a

Within folder "a" is folder "b" which is empty. When I try to delete folder "a" as a whole, an error message pops up reading "Error Deleting File or Folder. Cannot delete file: Cannot find the specified file. Make sure you specify the correct path and file name." Same thing happens when I go into folder "a" and try to delete folder "b" on its own.

I've run safe mode, cmd, regedit, moved the file, ended and restarted the explorer.exe process, creating a blank Notepad file with the same name and nothing! I downloaded Unlocker and it says that I had an "Error Debug Priveleges"; which directed me to Microsoft's website to read about setting up program Debug Rights and confused the heck out of me.

Can anyone help?

Thanks