The "A" key on the keyboard does not work | Windows 10 | How to fix?

Question

Keyboard

The "A" key (on the Russian and English layouts) on the keyboard does not work. At first I thought that it was all about the switches, but then it turned out that the keys work fine with Alt, Shift or Ctrl. The problem is also solved if you go into safe mode. What's wrong? Maybe it's a virus? It's clearly not the keyboard (connected another). I also checked the on-screen keyboard, everything is the same. Therefore, it is either a virus or something else, I can’t fully understand. I recently reinstalled Windows and didn't install anything.