i found out why my windows firewall not work it is because a few weeks ago i used a trial of windows onecare live when i uninstalled it it still left registry keys and now i cant remove them so i cant use windows firewall.
i tried a unistall program from Microsoft that should get rid of them but it not run i get error the error code is 0xc0000135 i get the same one when i try to use dal hardware scan.

does anybody know how to get rid of the registry files

i tried a unistall program from Microsoft

You said, you uninstalled it already, but it left some registry entries?
How do you know, this is the problem with your Windows firewall not working?
As to remove registry leftovers, just run "regedit.exe", search, and remove any entries, which have either program name, or program maker name in it.
Your registry may be messed up a little, already, but just in case, backup your registry, and create Restore Point before proceeding with "regedit".

there are a few registry files that i cant remove
name=devicedesc
type=REG_SZ
Data=microsoft windows onecare live

there is about five the same i cant remove them not even in safe mode

dont matter anymore sorted it myself but thanks anyway