Cannot Delete files

Im having a problem whereby i cannot delete certain files within a folder. When i hit delete on the file, nothing happens and when i hit delete on the folder the files are held in, i get the following error: "Cannot delete "name ": the file name you specified is not valid or is too long. Specify a different file name ".

I have tried using the Hijackthis and dellater "delete on reboot" features but nothing happens.

Any ideas?

 

Have you tried it in Safe Mode or renaming the file to a shorter name?