WMI Critical Error

Hi

Been having problems with my router which appear to have been caused by
uninstalling Norton. However although I can now configure my router it wont
connect to the internet.

Checking the relevant service dependencies gives a WMI Critical Error.
Further investigation in the event viewer shows the following;

WinMgmt could not initialize the core parts. This could be due to a badly
installed version of WinMgmt, WinMgmt repository upgrade failure,
insufficient disk space or insufficient memory.

Can this be reinstalled easily ??

Cheers

Motters