Okay lets start of by saying that all of this started around 2 weeks ago maybe more, initial problems started with my Mouse and keyboard disconnecting-unplugging.
It kept happening for a while with different time intervals sometimes would happen once in an hour then more often and so on.
Then after some time i experienced a full crash of the USB plugged devices if that's what I could call it, as I was playing a game my mouse and keyboard became unresponsive, usually unplugging them would fix this but this time I couldn't do anything except a hard reset on the system.
After that the problem became more often with me having to do hard resets few times a day during gaming and occasionally while watching videos or something else, after doing some reading I found that a corrupt profile could be the cause of this so i tried using the fixes provided by microsoft (registry value changes) (delete the profile and SID) value change did not help as they would reset back after reboot which is probably due to permissions and system protections issues i don't know if that's the case.
At one point it got so bad that the mouse would unplug every 10-5 seconds , so i tried deleting the profile at first I thought that did the trick the issue didn't occur for an hour then it did again, but without me having to do a hard reset just unplugging.
So i tried swapping my mouse which actually helped the issue and haven't experienced any unplugs that would render me unable to use the machine, I started looking more into the problem cause I was intrested in finding the cause even thought the problem was gone, I was still experiencing some clunky things download speed went down from 7mb/s to 1mb/s in general computer slowed down, transfer rate on my HDD got super horrible, so I was looking for the cause of these problems first I thought it might be the HDD.
Did chdsk, diskchekup, crystal disk info everything came out good, even though I could clearly hear loud noises coming from the HDD as it was working(very weird noises also, I tried deffraging it which I don't know how to describe other than it made it do music like actual music sounds, Didn't finnish deffrag since I got the black screen and has to restart)
Started suspecting some foul play from malware or just being hacked, used every possible tool from hijack this ( yes i know it shouldn't be used on a windows 7 x64 based system) junkware removal tool, combofix,hitmanpro, zonealarm, I also made a crucial mistake of downloading drivertoolkitinstaller and driver update which was a mistake and I instantly deleted them without using them, but I think the damage was done since I had installed them.
I downloaded a windows update which was supposed to delete shadow copies and fix some harddrive issues in general after I restarted my computer I got an error saying something like slimdriver couldn't be located (one of the driver update programs) the error was received as the os was booting and there was no start bar or anything around yet also I saw a command prompt pop up which was very very weird, after I pressed okay everything booted fine.
After that I ran everything again because I was very suspicious as to what that command prompt was, none of the programs found any issues as they didn't find any issue I turned on a game (Heroes of the storm to be exact) and after around 10 minutes I received a pink screen( yes pink) Sound was still there and from what I could tell everything was still working but I had to do a hard reset which caused some errors in the drive so I had to do a 4 hour chdsk to fix the problem as I was getting NTFS erros in my log every second.
At that point I was freaking out about the pink screen since windows didn't log any driver errors or crashes( funny thing is that Heroes of the storm logged 2 crash dumps about the errors which I recently found but I can't make anything of them maybe someone else could), downloaded process explorer, security task manager accessenum, system file checker, nothing suspicious came up, only thing I didn't do was check network connections with netstat and wireshark but I think that zonealarm should have that covered.
I started looking into the pink screen loads of theories came up with a lot of people having simmiliar issues and but nobody being really sure as to what causes it, I also received a black screen and a white screen aswell one during trying to play a game again( the same game) the other just out of nowhere as I was looking into the problem, sound was still there both times I could even hear the windows log off sound as i pressed the power button both times( afraid to do hard reset cause of fear of chdsk taking 4 hours again if files get corrupted.).
But these times the event viewer captured the crashes and giving this message ( Display driver nvlddmkm stopped responding and has successfully recovered.) At this point I have no fing idea what could be the problem i checked my psu voltages with CPUID can't tell if their okay, not sure if the hard is dying cause of the noises, not sure if its the slimware driver update command prompt pop up and error, maybe its a failing CPU or even GPU even tho the GPU is only 1 month old, all the other specs are pretty old (PSU,CPU,HDD all around 3-4years).
Also been receiving a lot of warning and errors in the event log ranging from MS essentials not updating and this one( Windows detected your registry file is still in use by other applications or services. The file will be unloaded now. The applications or services that hold your registry file may not function properly afterwards.) also few more.
So at this point I have no idea what the problem is, I would roll back the drivers but the problem didn't happen after i installed the new drivers which were installed on 12-9-2016 happened couple of weeks later, so at this point I really have no clue as to what is going on. If anyone is intrested and maybe can help, I would really appreciate it and will post specs and sys infos. I am very sorry If I am incoherent and if there are any spelling issues It very late where I am from, any help would be greatly appreciated