BSOD several times during the day. System Service Exception

Hey!

My issue is that my computer gets a BSOD several times per day, mostly after my PC has been idle for some time doesn't matter if it's turned off completely or just put into sleep mode.

I posted a thread here before and got some help, but then I stopped recieving help with the issuses still on going. Before it was just twice per day, now it's more. What the person did to help me was telling me to use Memtest 86 and let it run to 10 passes, I updated the Realtek ethernet driver, I also changed my Nvidia drivers following the intructions provded on this forum to perfom a clean installation.

I later stress tested my graphics card using Furmark test and let it run for 30 min, the first time I used the test it crashed around the 20 min mark so I redid the test and this time without any issues.

So far I have recieved two messages when the BSOD occured, it's mostly been System Serivce Exception. But after I ran sfc.exe /scannow I got another message stating IRQL_NOT_LESS_OR_EQUAL.

As I finish typing this, it has now crashed 3 times, but this time without a BSOD. Then screen just froze, the sound stop and is just making a weird constant noise, the one you usually hear when your PC freezes.

I took my PC to a repair shop instead. I don't know how to remove the initial post.

Taking my PC to a repair shop didn't work. They had it for 3 weeks and they couldn't bring out a single BSOD. When I took it home it worked fine for about 4 weeks with no issues at all, then they suddenly started again.

I don't do anything specific for it to happen, it can happen within 10 minute after I start the computer or it can happen after 5 hours and anything in between. The guys a the repair shop told me that it could be due to an electricity problem, so I switched wall socket, that made it work for a whole day and a half before it started to BSOD again.

I don't recieve 2 different messages but 3, IRQL_NOT_LESS_OR_EQUAL, System Service Exception and Memory Management.