I ran Norton windoctor a few weeks ago, and after that i havnt been able to watch any movies at all.. just purple screen.. ive tried reinstall ffdshow, installed Nimo etc.. Nothing seems to work.. anyone have a clue of what could be wrong??

Probably your system got confused...

Suggest uninstalling Nimo codec pack and other codec packs, filters, players you can see in Windows Add/Remove Programs menu.

Then download Media Player Classic, test a videofile (AVI) with GSpot, install the codecs separately.
When works and you can watch in MPC, could install Nimo codec pack, if you wish.
See the Guide to using codecs topic, point #5 for the right installation of Nimo.

I have the same problem with Media player classic # K-Lite Codec Pack.Any ideas?

Maybe DirectShow got totally b0rked. Try this:
Start -> Run -> regsvr32 quartz.dll

tried it, didnt work.

Its like this

Any luck guys? Am i the only one facing this problem?

You need to update your video drivers.

I have the latest drivers for my graphics card.

Then use an older version of the driver. Newest is not always the best. Assuming you are currently using the Overlay renderer, you could also try selecting a different video renderer in MPC options. Overlay is sometimes broken with some drivers.