Lately my main PC has been going through a series of hardware failures, which is very concerning.
Some two weeks ago was the first one, in the form of bad sectors on my main hard drive. It affected my ext3 file partition, and I didn't think much of it - so I went to take on an old wish of mine, namely overclocking the CPU. I raised voltage for about 0.5v and, by changing the multipliers (didn't touch the FSB timings), I increased the frequency from 2.6Ghz to 3.0Ghz. All seemed well.
Then the bad sectors appeared for the second time, touching my Windows partition. I ran CHDSK, but to no avail. Seems that in the meantime, there appeared memory errors, preventing Windows from booting and causing live Linux distros to lose their functionality - I ended up removing two of the newer RAM sticks, leaving myself with 1GB of RAM that seemed to be stable. Despite that, it seems that on the top of all problems, there are occasional system freezes as well, affecting both Linux and Windows installations.
What's going on? Is this a set of coincidences, or have I broken something vital? Any ideas of a culprit?
P.S. Motherboard & CPU are year 2006 models; the system was built in 2007 and upgraded again in 2011. Motherboard has been taken for repair once, all other hardware has been going strong before becoming too old in comparison to today's systems.