Drivers wont install (dead gpu's?)

I went today to install the new beta drivers for my sli'd 260m's (both previously overclocked but have been at stock settings for a couple of weeks now), but the installation process was dreadfully slower than usual and eventually the installer would simply say installation has failed. At first I thought it was just because the drivers were in beta state so I cleaned, rebooted, installed the previous version I had (the 260.99's). Again, same issue.

I've had an issue in the past where my 9400m chipset would cause me trouble while it was enabled along with the 260m's. So I cleaned the drivers (or what was left of them), tried to install the betas; and again the installation froze on the same part, but this time the screen turned black and a second later red gpu artifacts and two green lines at the top and bottom of the screen appear. The screen flashes black and I'm back to my normal desktop with the installer telling me the installation had failed.

NOW I'm starting to really worry, I have recently noticed my gpu temps reaching over 100 degrees when the fans would randomly stop spinning (I found this was certain CPU overclock frequencies causing the gpu fans to stop spinning for whatever reason). Since then I've kept the cpu at stock settings and the fans work normally but occasionally will malfunction and not spin. I fear that my cards are dead or likely dying, anyone have any ideas?

I just hope I'm not stuck with a massive netbook now.

 

Your GPUs can't just "die" don't worry.
Have you done a repaste on both cards,if not try a proper one or have somebody to do one for you if you think you can't do it.

Also clean your drivers with DriverSweeper or whatever software you're comfortable with,your registry as well in safe mode. Clean your fans/heatsinks they're probably clogged up with dust bunnies.

 

Dust has been cleared already but thermal paste never got replaced yet, I'm sure there's a guide on google about that I'll look up.

Thanks for the reply, I'll try it out!