BleepingComputer.com: problem with Hardware i think

first of all since october , i had a overheating problem and at the same time a virus infection. i uninstalled the virus thanks to this forum help and after some time went to a tecnician and the overheating problem got solved. but then 2 month later , it was my monitor starting to have screen problems till it broke completely... after some time the pc shutted itself down once but the little light that turns on when u press the on button never shutted itself. i had to unplug the power cable , replug it or else i could turn the pc on cause with that light on, it was behaving as if it was working. anyway restarted it and when i was in windows and tried to use the internet browsers it wouldnt work , everything that would work with the net was super slow unusable. called my provider , we tested it for hours and we concluded it was the pc , the internet signal was good , everything working perfect with the net . a few days after the pc shutteddown the same way as the first time , when i relogged , the net was miraculously working again.witouth an explanation. a few days later , i pushed a cable while mooving out of my secretary , the cpu case lost balance and rolled over :S a blue stop message appeared.and it didnt wanted to work again.
i checked the hardware and beside 1 memory block had popped out of its place everything seemed normal
tried to restart the pc again but it wasnt managing to boot windows or even sense that my Pc had a hardrive . replugged the cables and after a couple of attempts it worked again witouth troubless.
i went to download a file a few months later (i download a lot of stuff everyday) and i got fooled by someone , instead of a ISO i got a virus downloader ,i used my antivirus AVAST and antispyware Malwarebyte (downloaded here) and caught 4 files with it and 1 virus.
all kept working fine
till lately
everytime now i try to play a game it will shutdown . and sometimes i received this stop message
STOP: 0x000000f4 ( 0x00000003 , 0x897c0180 , 0x897c02f4 , 0x8060577e )
could u help me figure out what is happening to my pc , the falling of was my fault , an accident , but since october i have been having strange problems one after the other... when in the past 4 years never got 1 . so its not uncaring or bad usage. something is wrong with the pc... please help me

Hi, sounds like you have had one hell of a time with this computer.

With as much as been happening with it, I am just curious if this computer is actaully clean of all malware and any other possibilities.

My suggestions are this.

Open the computer and re-check every piece of hardware for loose cables or connections.

Make sure all add-on cards are firmly/fully seated into their slots.

Make sure nothing is shorting out to the computers case.

You may want to do a little more checking to make sure you do not have rootkits or some type of trojan still infecting the machine.
My best advice to that is going to the AII section of our forums and asking for assisstance with trained people who know the proper procedures.

Good luck!