Hi again Senko,
Ok...that's one problem out of the way (for the moment at least

).
The next one to eliminate will need a bit more information from you; so I would like you to go
here; read the Guide; download and install this
Freeware program called "Everest™Home Edition"; then once its installed...go to the "Computer Section"..under 'Summary' and post the screenshots (it will probably need two) of the information displayed.
While you are in the mode for giving information, could you also give the details about your Power Supply Unit (PSU) too please.
One we get this information, we can then assess the next course of action.
In the meantime, a couple of questions...
Over these last 5+ months, have you done regular defragmentations of your Drive/s?
How 'old' is this machine of yours?
With persistence and patience, we
will eventually make this cantankerous contraption 'behave', so, please bear with us.
Post back with the information and we shall continue.
Regards,
__________________
Dave T.
If it works, Don't fix it!
Especially if Bill Gates had anything to do with it!!