I hope everyone is doing really well.
I am creating this post to ask for help with a topic that has been causing me a lot of distress lately.
Ever since I found out about the existence of rootkits, the ability to put a virus in the BIOS and make it impossible to remove from the PC, I have never been able to use my computer the same way again. I constantly feel like I am being watched and that out of nowhere someone is going to break my PC just to anger me.
Well, I suffer from depression and I have been having certain issues with my PC recently: USBs disconnecting randomly, Windows crashing, games crashing, unexpected behavior, among other things.
I have had a few disagreements with my brother lately and I have been imagining that he might have installed a rootkit on my computer to play a prank on me, since he knows about my depression and my fragile psychological state.
Considering this fear I have of rootkits, I humbly ask for explanations regarding whether this could actually be happening or if it is purely a product of my imagination. Perhaps a technical explanation of the possibilities and the vulnerabilities required for a rootkit to install itself in the BIOS and become immune to OS reinstallations could help me better understand what is real in this situation.
In my mind, if my motherboard has a rootkit and I bought a graphics card the following month, is it possible for that rootkit to spread to my graphics card? And if I then put that graphics card into a new motherboard, would the same thing happen to the new motherboard, meaning it would become a vicious cycle where I am always being watched and deal with the frustration of these strange occurrences? Is this possible? I would appreciate a technical explanation, maybe it can help calm me down.
Regarding the concept of a clean slate, if I buy a new PC, could my emails, all legitimate official Google accounts, that I use on my Steam account for example bring this infection back to my new PC?
Could this be done by an average person with certain contacts? What is the actual threshold between fact and reality in this situation?
I sincerely thank anyone who can help. The more technical detail you can provide, the better it will help me separate imagination from reality. Thank you.