I had window 7 and I upgrade to window 8, I found my system running very very slow and on task manager disk usage is around 100%. I did following steps to resolved this issues, now disk usage is 5 to 10% when ideal.
- Press windows + R key
- Select the option "Control Panel" > "System and Security" > "System".
- Click on "Advanced system settings".
- Under performance, click on "Settings".
- Go to Advanced tab, Under Virtual memory, click on "Change".
- un-check "Automatically manage paging file size for all drives" check box.
- Select your windows drive (where OS is installed).
- Click on Custom size radio button.
- Set Initial size equivalent to your RAM size in MB. (ex; if 4 GB RAM then type 4000)
- Set Maximum size to twice of your RAM size in MB. (ex; if 4 GB RAM then 8000)
- Click on Set and Click on OK to close all window.
