someone has hacked into my computer

[myown]

and made a couple of folders , which i canot get rid of.
i have tried using the normal commands and ftp commands.
i have tried in dos shell to delete them but the error i have is that they are not there.
but they are because when i run dir i can see them

please help.

 

[cnd2kdotcom]

I agree with Doug, a clean drive would be best even though this could be just something someone did to screw with you and could be harmless. overall the best approach for something like that would be the new installation with better steps in security. good call