I have had this PC for a couple of years now and everything has been fine with it, recently (a few months ago) it started getting really laggy and slow after being on for 8hrs +, i figured it may just have a lot of stuff on it.
The issue was basically forcing my Ram usage into absurd levels and once it hit 99% it would never come back down, i was going to buy an SSD anyway so i figured w/e ill fix it when i get the SSD and thought it could just be the HDD having a problem with writing info (dont ask).
I bought the SSD very recently (2 weeks ago) and put it into the computer at the same time installing windows 8 and i am still having the same issue i had before, it isint just as bad but the slow down is still very noticable and when i load into wow very occasionally my FPS drops exceptionally low, this then turns into a complete freeze of the PC.
I have tried the dump files on all different settings, it is currently just handled by the computer.
This screenshot is my performance tab in task manager at the time of writing this post, i have got nothing but google chrome with 5 tabs / skype / battle net desktop app / steam active and i would love to know if there is anyone who knows their stuff who can identify what is going on with the computer, i just dont feel my ram usage should stay as high as it does (i know ram being used is good) but 99% while running wow in a raid seems a bit extreme.