Hi StefanUnkovic,
I am Vijay, an Independent Advisor. I am here to work with you on this problem.
This is a good article to increase RAM
8 Ways to Clear Memory and Increase RAM on Your Windows Computer - https://www.makeuseof.com/tag/5-ways-clear-memo...
Do let me know if you require any further help on this. Will be glad to help you.
Disclaimer - This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.