Msvs Starts Slowing Down

Hi, guys,
Long time no see...

Here is my issue.
I have a laptop with the MS Visual Studio 2017 Community Edition installed.
Everything was running smoothly, until one day I found that in the middle of editing the file an IDE froze. But just an IDE - the laptop was responsive. I was able to hit ALT+TAB and switch to another application and everything was working fine.
I started the Task Manager and saw that the Studio took about 60-65% of CPU.
I am sure that there was no update to download as I was just installed some of them and rebooted.
So I killed the Studio and started it again. Was able to work for about 1 day and then the laptop froze when I was in MSVS again with the same symptoms. Laptop is responsive, MSVS is not.

Am I infected?
Should I run R&R to verify?

I tried to close couple of files in my project - this time I was able to run for about 3-4 days and the IDE stopped working again.

Maybe I'm hitting some kind of memory restriction? Or I should clean the cache somewhere?

Please advise.

Thank you.