Found a folder in which short video recordings captured from the screen, a virus?

Question

Malware

Good time! Lord, I'm confused. I found a folder in which there are videos from my desktop. The videos are short, not all of them open. The longest video where I register on a popular site, and for example, a video where games are running, short 1-2 seconds long. The most unpleasant video where I go to my personal account on the Federal Tax Service, in addition to the password, in general, all contact information is highlighted. The folder called "sharp" is located on the second HDD where I have a lot of files stored. I use the first disk under the system.
I have already ruled out the possibility that I myself accidentally press the hotkeys to start capturing the screen. I still assume it's a virus.
Please advise what can be done first. Kaspersky does not find viruses, I also do not find anything suspicious in the process of a hacker, the system is not overloaded, the computer is powerful.
Of course, I understand that most likely you need to reinstall Windows, but still I want to watch for now. The folder was created a month ago, the frequency of video recordings is once or twice a day!
I confess that a lot of software was installed from torrents, most likely an infection from there. On the date when the folder was created, no software was installed.
In general, I ask for advice on what else you can try at the moment.

Answer 1

Do you have MSI AfterBurner on your computer?
Which can record video from the screen (when installing RTSS included in the kit).
Incomplete files are written just with the extension * .avi.prerecord

Answer 2

You said in the comments:
I, not knowing what Movavi is, googled it.
There is an idea that a program downloaded from torrents that contains a module for recording video from the screen, which you yourself added to the exceptions, may contain a Trojan that brazenly uses its capabilities.

Answer 3

Doesn't look much like a virus.
Most likely someone installed a Trojan on your computer by hand. Children, bad friends?

Answer 4

Look at rules of an exception of an antivirus. Perhaps someone really installed malware, adding it to the exceptions.