A few BSOD's in the last month

So around February, I decided to buy parts and build my first P/C. It has been running very good in the last few months, with minimal to no problems. Being an IT major, I manage to take extra cautious care of my P/C, and attempt to troubleshoot and repair any problems that occur. However, in the last month alone, there have been several BSOD's that are concerning me. I've managed to find some decent information about these errors, but I cannot seem to fix the issue at hand. I am unsure whether or not it is a software issue, or a hardware issue that is causing the BSOD's, but I wish to believe that it is a software issue.

To explain how the errors began, I must inform you that I have been patiently awaiting a MMO game to be localized here in America Called PSO2. However, due to my impatience and lack of localization information, as well as delays, I downloaded the Japanese version of the game, as well as English patches in order to be able to do as much as possible in the game. The download was slow, as to be expected of a foreign game, as well as the updating process, but after downloading a tweaker for the game, running it and tweaking the game to apply the English patches, I was able to play, with seemingly no problems whatsoever.

However, a few days had passed, and after utilizing the tweaker to both adjust the game to be in English (as much as possible), and launch the game, I began getting some strange errors on my p/c, and didn't quite put 2 and 2 together. I decided to record my gameplay, using camtasia recorder, while having firefox open so I could post the video online shortly afterward. The recording was successful, but for some odd reason, was saving very slowly, until my computer ave me a Stop Error (BSOD)

I thought my p/c as just overdoing it and had to shut everything down because of stress, or heat (it was a very hot day; I figured my processor was overheating, despite not being overclocked). I ran scans, checked my hard disk using /chkdsk as well as the Error checking tool, and found nothing out of the ordinary (I could have just been reading it all wrong also). I decided to manually patch the game and not utilize the tweaker anymore, which was obviously a bad thing, as when I launched the game (unfortunately using the tweaker) my computer crashed again.

After this I figured the game was to blame, and deleted it, along with the tweaker off of my computer. Afterwards, my computer didn't seem to have much noticeable trouble, besides the monitor not turning on after awakening from sleep mode and me having to power it down by holding the power button, so I decided to re-download PSO2, blaming the tweaker for the stop errors, and using it only once to install the English patch.

My P/C ran well, though over time I noticed slow down. I looked at my task manager, and noticed that one of my scvhost.exe processes was running EXTREMELY high, running at approximately 600k+, which it usually runs at 150k-250k. After restarting my computer, it went back down, but I noticed that after playing PSO2, it would rise, and not go back down until I restarted my computer. I figured I couldn't run PSO2 for too long, or as often, and would take breaks to give my p/c a break as well.

A few days later, PSO2 prompted me for an update, to which I applied it, but then had to re-utilize the tweaker to reinstall the English patch. After which my p/c didn't show any signs of problems, besides the rising memory usage of the scvhost.exe process. After a few hours, I decided to let my computer go into sleep mode, to which it replied with another blue screen. After my computer restarted, I promptly deleted the tweaker, uninstalled PSO2, and deleted its file/folders in my programs folder and decided to not download it again.

Afterwards, I checked my discs again, looked around online for help with some of the errors. though unable to get an accurate answer. I ran scans from both avast! internet security, and a free version of malware bytes. I know two antiviruses don't run well together, so I didn't run them at the same time, and malware bytes only works when I launch it, usually not causing any problems with the antivirus I have installed. I also ran ccleaner, checked for registry errors using ccleaner, and even looked inside of my casing for any loose/damaged components, as well as used a dust remover for dust accumulation on fans.

My p/c ran fine, has been running as when I first got it. However, about a week ago, while watching youtube videos, my p/c began running my weekly virus scan with avast, and promptly blue screened after 5-10% was scanned. I again checked around online for help, but noting was really that much help. I decided to ignore it, figuring it may be something wrong with my software, and promptly checked for updates for my p/c, as well as looking for updates for drivers I had, to which I do believe I found none. I didn't want to run the risk of another blue screen, so i didn't run another virus check.

During last week, I had another problem with my monitor not turning on after sleep mode, to which I responded with a button hold shut down and restart. Two days ago, while putting my p/c in sleep mode at night, I turned away to get prepared for bed, and looked at my p/c to see if it went into sleep mode, and noticed another blue screen error. I checked my p/c yesterday morning and found several files from the PSO2 tweaker in my user/appData/Local folder. I promptly deleted them an searched around for any tweaker or SEGA/PSO2 folders, even going as far as searching through my registry for any of these folders, though there weren't any that I had found/noticed.

Today I decided to run a virus scan, to check if there were any viruses on my p/c. I was watching it, actually waiting to see if it caused a blue screen, and noticed that Avast! found a trojan virus which it promptly deleted from my p/c. Unfortunately, after a few more gigs of memory was scanned (about 5% later) my computer blue screened again. My computer restarted, and did a boot scan, which I had scheduled prior to this, and was able to complete the scan, and found nothing. After my computer loaded up, I searched for any updates, found one, and installed it as soon as possible.

EDIT: Since then, there have been 2 instances of BSOD's, each event occured when putting my p/c into sleep mode for the night. Before and between these two instances, I attempted to mod minecraft, which failed and was followed by me deleting my old .minecraft folder as well as the mod. I'm unsure if the BSOD's were/are caused by this. Full/boot time scans from avast and full scans from malware bytes yield no malicious software found. I have re-uploaded the attachment with the recent blue screens. My p/c has been running fine otherwise, with the exception of the svchost.exe files still running with high cpu usage and causing occasional slowdown (svchost.exe link here: svchost.exe taking up too much CPU?)

I apologize for the... well, massive amount of text, but I'm unsure on whether or not my p/c is now fine or not, and wanted to give you the most accurate description of the events that have occurred in the lat month. I contemplated doing a system restore to last month, but I guess my p/c didn't save restore points past June. I've been contemplating getting another hard drive, backing up my data, and restoring the p/c to factory settings, or finding someone with a proper w7 ultimate 64bit disc to do a clean reinstall of w7, as my disc was lost. If I can, however, I would like to avoid doing this as I'm low on funds. I would appreciate any help. Thank you.