Moose2_45 :
I've got a hp pavilion 550-136na and I'm trying to install an nvidia GeForce gtx 660. Got everything spinning as it should but when I got to my device manager I can't see it as being listed.
Without that I can't put drivers on my computer.
Please help.
Try downloading the latest drivers a running them from nvidia site. The driver will detect the gpu and it should work.
IF IT DOESNT WORK,
Try running this software.I recommend downloading and running Reimage. It's a computer repair tool that has been proven to identify and fix many Windows problems with a high level of success.
I've used it in the past to identify and fix everything from blue screens (BSOD's), ActiveX errors, corrupt files and processes, dll/exe/sys errors, recover lost memory, Windows update problems, defragging, malware removal etc.
http://downloadreimage.com/download.php