Laptop slower than before after restarting?

I'll be brief: my laptop was way too slow so I saved everything I needed on my hard drive. Then I googled how to reset a laptop and followed it.

Now it is useless, so to speak. Google Chrome only opens after 15 minutes and a Google search entry also takes several minutes.

What can you do?

You have probably deleted important system files. You can't assess that via remote diagnosis.

Do you have an ssd or hdd? It may be that he is updating and that he is therefore very busy at the beginning… With a hdd possibly also slow internet

But do it again like this