My nan had graphics driver issues when I upgraded her, running Windows update or going to the relevant site (nvidia or amd) and manually updating the driver should hopefully fix it.. They have tools that automatically detect what graphics drivers you need, but try a windows update first as there are documented graphics driver issues. I don’t mean to sound condescending but a graphics driver is basically some software that tells windows what your graphics card is, and how to best use it.. If the driver is not quite the right version you will get issues.
My nans picked up the right driver by running Windows update and checking optional updates and selecting the graphics driver.
If you’ve successfully installed win10 and picked up some malware, the critical thing is to get the win10 key so you can upgrade in future.
Malware bytes is quite a decent one to download and run if you get really stuck.
I wouldn’t worry about the printer for now, just get the system stable.
I’d manually run Windows update in the first instance and check all critical and optional updates.