gitadumi.dll claimed my sibling's laptop. I had to re-format the drive to make the laptop usable again.
Can't believe I still remember that name from about 4 years ago.
Once I went to a fake runescape website that looked legitimate and on the "Allow Java to Run" window, I clicked Allow and got a pretty bad virus on my that PC. The virus kept duplicating desktop shortcuts until the PC crashed. I wasn't aware of how to remove malware at the time, so I installed Linux on it and use it for local, dedicated server testing.