I think you should know how you got it. Most likely downloading files from non reputable website. May it be a lesson to you. And if you reformat and keep the files itll probably happen again soon.
Does someone else have access to that pc ? Looks like the default font was set to windings.
Edit : I just realised the font wasn't the only problem lol. Can't help you any further :/
Sounds like what happened to my buddy's pc. He ran a benchmark test and the information leaked to a miner and the miner got into his pc after finding out he had a 1080 and a i7 with 64gb ram and remote accessed and deleted his user and all his files and was in the process of turning his rig into a remote accessible mining rig. Poor kid lost everything lol