The worst that I had is... I captured a virus once and kept it there just in case so after a few weeks i forgot what it was and opened it, 5 seconds later... SYSTEM32 is GONE....
I'm on a mac, so there's not much to go wrong, once the finder crashed but everything else kept working, and one time when I was running a virtual machine with a few settings set to high I had a full system crashed (I was actually a little proud of myself)
A friend tried to overclock an old dual socket celeron based system about 9 years ago now, and he pushed the overclock a little too far and it wouldn't boot. So he went to reset the bios and instead of jumpering the bios reset, he jumpered a fan header. All the nice speed monitored fans in the system no longer worked after that :) Thankfully, that was the only known damage.
hardware = I cleaned all the dust from my computer n forgot to connect the Coolin Fans to the power supply. Cooked the motherboard
software = Installed installed Partition Magic on Vista n it said it needed to fix a mappin error. Clicked ok n spent the next 8 hours fixin it. Coudnt access any partition on the HDD
Oh dang, that sucks. I'll be double checking after I clean my system from now on. I had a fan controller fail once so my fans ran at 5% my PC just kept shutting down after 5min. of work, I guess I was lucky it didn't fry.
I have this IBM PS/2 computer that had Windows for Workgroups 3.11 on it. I purchased it from someone and they never gave me the reinstallation diskettes so it was the only copy I had. One day, I was kickin' it in DOS (5.0) running DBLSPACE.EXE, and while it was in the middle of disk compression, the power went off due to a thunderstorm. I couldn't access the hard disk and I had to reinstall MS-DOS (luckily I had some 6.22 diskette's on hand.) I completely lost WFW 3.11! To this day, however, my old reliable PS/2 still runs like a dream, just without any copy of Windows installed.
my sceince teacher spilt acid on his latop didnt think anything of it the next thing we all knew it sent a power surge though the school and cut the power in the school the laptop was totaled
When I was big into overclocking - had a brand spanking new (at the time) Pentium D 955XE...tossed it on the motherboard, hooked up my copper Mousepot (big copper tube) for some icewater testing, powered it up and POOF! Instantaneous burnt silicon smell. The backplate for the Mousepot was metal, so were the solder ears on the back of the CPU socket...you can take it from there...cooked that dual core HT proc in 1/100th of a second. Also killed the P5WD2-Deluxe that was housing the operation. The Corsair Dominators survived though lol.