Computer acting up, what could it be

[Hooahguy]

did you try a reinstallation of the OS?

[FactionHeir]

Hi guys,

Thought I'd give you an update. Did the cleaning and problem persisted. However, a few days back I needed to reboot my router because the internet was a bit sluggish. Actually turned it off and back on, but forgot the turning it back on part
So my laptop boots up, no black screens just yet. Turn on router and just when my router is about to connect to the net (and right at the time it would be broadcasting its own signal to nearby receivers i.e. my laptop) I get a quick black flicker and the graphically distorted message as per screenshot.

So I did a bit of testing....connected to my router via LAN cable and turned my internal wireless card off. Since then. I've not had the problem again (though if I turn the card back on and go wireless, it comes back obviously).

Interesting part about this is that the wireless card is one of the very few hardware pieces that Dell Diagnostics does NOT check, which is why it didn't flag up.

Now I do wonder why a problem with my wireless card was causing those graphical issues including critical system failures. And of course what I should now do about the inbuilt card - could it be just a driver error or is the hardware likely damaged? Note that after the black screen etc my internet otherwise worked just fine (with the exception of getting a 1 second lagspike every 1-2 mins) and I didn't get any other problems. It was limited to boot/first connection to router only. First - because if I turn the router off and back on after a while without rebooting my laptop, I would not get the black screen issues.