BSOD (playing Runescape) and Win 10 problems

I was finally able to leave Safe Mode and boot normally by uninstalling the drivers of my HD 7870.

This happens when I try to install dGPU drivers and reboot into normal mode (tried the latest drivers and the one before that), basically super laggy and nothing really opens and everything stays partially on the screen etc.
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No change, reckon it's my GPU's hardware problem then? Nevertheless I tried to upgrade to Win10 while my dGPU was unplugged and it just shut down and failed unlike before because there was no restoring previous Windows screens etc.

I'll try to update my Windows again by following every tip while only using my iGPU, because it seems like the only problem it has so far, I also think I might have ruined my onboard audio somehow while changing dGPU slots so I guess I need to buy an audio card.

Still the same error as first time.... Don't really have anywhere to test it.

I downloaded the Windows 10 ISO and tomorrow I'll go buy a DVD as I don't have a single empty one right now onto which I could burn it, I also can't use my computer unless I unplug my GPU as otherwise it will automatically install drivers (even if it requires a restart, before doing the restart I still can't do everything I would like due to different errors), my on-board audio seems ruined so I think I'll buy an audio card aswell, in a couple of days I'd like to see if I can upgrade to Win10 and if there are any problems with my iGPU, if not I can't help but think it is my dGPU-s fault. If u think otherwise about something let me know, thanks.

Edit: My screen just froze totally while playing on iGPU

Well I have the ISO file so I should be fine, nevertheless the upgrade is not that important, I'm thinking of taking my computer for a checkup so they can actuwlly test the parts.