I have been playing world of Warcraft off and on for a little while. I have owned my current computer for 3 years and is the one I use to play wow with. Ever since recently, I run the game perfectly on max settings, with 40-60fps at all times. Now I get 1-10fps when running the game on the same settings and same computer. Recently I upgraded Hard drives and had to re-install windows and Wow. I installed Wow on my secondary HDD, which is the only change in my system. All my drivers are current. Also, I tried Dead rising 2 for the PC and my computer ran is great with 60fps. What could be causing WOW to run so slowly? Is it because the 4.0.1 patch or something with my system? My buddy with a similar computer is running his just fine. This problem is not due to heat because I have fantastic cooling This problem is probably not due to drivers because I have installed and updated all drivers I have tried disabling all addons, and problem still persists. Thank you very much in advance for any help or advice.