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Ever since installing Windows 7 (64 bits) my mouse stutters. Skipping every now and then, staying in one position while I move the mouse, etc. I do a lot of photo editing and it's really annoying and makes my work almost impossible. Hope someone can help me out. I already tried some stuff on...

I have been getting random crashes , not often , for awhile now. usually the screen locks up or just goes black. it doesnt happen often enough that I can reinstall OS and know right away if that fixed it. bluescreenview says they are all caused by "ntoskrnl.exe". I have attached a .dmp from...