Worse mistakes you made while building/repairing a PC

[Bofferbrauer2]

Captain_Yuri said:
I said "If anything goes wrong, feel free to call me" when I finished fixing my uncles computer.

Lol yeah, happened to me too.

My neighbor had a game disc with a virus on it. He also had an antivirus who totally locked down the entire OS and thus PC when he found said virus. So I had to juggle into the BIOS to get it to boot from a CD (was the late 90's, booting was generally either HDD or Diskette), format the entire PC and reinstall everything except the game. Took me about 8 hours to do so. What's the very first thing he does afterwards? Insert the infected game disc again and tries to play it!

AAAAAAAAAAAAARRRRRRGGGGHHHHHHHHHH!