I need some help friends.

I was trying to install an anti-virus and now system crashes whenever I try to access net or carry out any major operations. I get the blue screen with error NO_MORE_IRP_STACK_LOCATIONS. I tried various fixes (including reinstalling windows), but nothing works.

System is working absolutely fine in Safe mode with networking and am able to use internet, but many device drivers have not loaded. Screen resolution is stuck at 640 x 480 and many devices are not working.

So what to do, any suggestions - please do help friends.

Is there any other fix for this - other than reformatting C:, which I am scared to do!!!!

Waiting for your responses. Thanks!!