I've just started Folding@Home, and I was told by a lot of people that I should try overclocking to get that much more horsepower out of my rig. I had bought myself an i5-3570K (Ivy Bridge), but really I was only expecting to use the unlock and overclock a few years down the road, if I ever felt my rig was becoming too slow or outdated.
So I went into the UEFI and accidentally activated the OC Tuner (once you click it it's litterally just "OK" or "Cancel"), it rebooted my whole comp and set up a decent 4.22 GHz clockrate. But after a few days I've noticed a few things crashing... Firefox, Youtube vids especially, and F@H when I leave it alone for long periods of time. The voltage isn't too high (it hovers between 1.18 and 1.24 V), and the temperatures are staying under 50C, but these crashes have me worried. I tried to disable it in the UEFI, but the only options it shows are "OK", and "Cancel".
Even if the crashes are unrelated to the OC, I'd like to cross it out as a possibility for sure, and just turn it off for a while. Cancel doesn't seem to do anything, and Ok just reboots and maintains the overclock. How do I put things back to the default way in which they were before?
Try going to the Exit menu and selecting Load Optimized Defaults. I'm not sure if that resets the SATA config or not, but if it does, and you're using AHCI mode now, you may have to reselect that afterwards to be able to boot into Windows.