and the system was downloaded)
by the way, an interesting fact. I downloaded a special program from the official website to check the system for licensing, and it said that everything is fine with me. Good pirates, well done)
Cleaning the registry is tedious; you have to reinstall everything anyway.
Defragmentation requires n% free space on the hard drive, and there is never enough.
By the way, Flander is right; if you know how to work with the registry, you can do a lot. One of my friends had a virus, like "send an SMS," and he figured out how to remove it through the registry.
A year ago, various viruses constantly infected XP, which also blocked everything. I removed them through the registry.
And then I installed Windows 7 on another hard drive, and Avast didn't even find them there.
It's better if Morning doesn't have an avatar, or he'll put some boring one again
Added 1 minute ago
It's not within the power of an ordinary person.