So yes, I should not have gone into the BIOS in the first place but curiosity got the best of me. I have a ASUS P67 motherboard. I found something called "OC Tuner" in the BIOS (in the Advanced settings, I must confess), clicking on it gave two options; "OK" and "Cancel". I clicked on OK, computer shut down, it started up twice, shut down twice, started up the third time however now instead of 8 gigs of RAM it is only showing 4 Gigs. Can anyone tell me what happened and how to salvage this situation?
First reset your ram by taking it out and putting it back in and make sure that is not your problem.
If that dose not work unplug your computer and look for a battery on your mother board it should look like a watch battery remove the battery for several minutes whale your pc is still unplugged replace the battery and start it back up. what this dose is reset the bios and any thing you changed.
worst case you fried the ram or it just went out. try putting some different ram in to see if that is the case.
P.S most people mess something up the first time to go in to the bios (i messed up several times in a row at first), but your sure not going to learn if you dont try.