Your windows is unquestionably fully borked
Don't install McAfee, and don't install PCCleaner, they're irrelevant apps from XP days, now nothing more than malware.
By clean installing it will sort out your drive arrangement also.
But the whole windows install is completely borked
Previously you asked about warranty and we advised you how to register it
https://www.pcspecialist.co.uk/forums/threads/pc-warranty.99112/#post-758800
Once registered all the details are in your account, if you haven’t done that that’s still the first thing you need to do and then come back...
Please don't buy that as it will be instantly outdated in January as next gen GPU's are announced at CES in the first week of jan, and you'll get more performance at the same price point.
PCS are just a system integrator, they simply build what the customer orders, it's not down to them to alter anything, unless the customer seeks advice. The customer is expected to know that they're designing something suitable, or seek help if they're unsure.
If you read the previous link...
Blame intel for making such poor processors, worth getting advice in future if you don't understand hardware
https://www.xda-developers.com/intel-raptor-lake-instability-damage-permanent/
I suspect then you've got silicon degradation, the only solution is to replace the processor.
Even then though, you need a minimum of an H150i on that CPU, preferably a H170i
Unfortunately the cooler is nowhere near suitable for the CPU.
Have you applied the recent microcode mitigations for the silicon degredation issue as that will have been greatly exacerbated due to insufficient cooling
Could be a false positive, but I’d treat it as malicious never the less. It may be because it’s packed in a gzip archive.
You can upload it to Microsoft for analysis and then they can update defender
https://www.microsoft.com/en-us/wdsi/filesubmission/
Twitch / Discord etc are all exactly the same as any web link with regards to viruses, they transport them in exactly the same way.
Even known websites can be compromised, hackers can gain control of a page, change the embedded files or links to dangerous ones, this is why antivirus is so...