Before working on serious problems on your PC, backup as many files as you can, even if only to diskette. Thankfully, the methods to repair the high cpu usage problem are fairly easy and you can try all them one by one. You can follow the measures as below to fix the high cpu usage problems.
1.First of all click the Start button to view the Start Menu. Then choose the Control Panel option.
2.After click Control Panel, enter into System and Security, then click into Windows Update.
3. Now you are at the Windows Update section of our Window 7 Control panel. You can manually look up for any new updates by clicking the Check for updates button
Warning: Your PC might need to restart while following these steps. Please save and close any documents you may have open before you start.
Note: You may need to run this process more than once to download all available updates.
Load Windows 8.
On the 'Start' screen move your mouse cursor over to the bottom right hand side of the screen.
This will display a sidebar with a list of options. Select 'Search'
A screen will appear with all your installed apps, select 'Control Panel' from the 'Windows System' list.
When the Control panel loads select 'System and Security'
Then select 'Check for Updates'(this can be found in the Windows Update section.
Then select 'Check for Updates'
Windows will start searching for updates.
Once Windows has finished searching for updates, a button will appear giving you the option to update. Press this, Windows will then install all the important updates.Your computer might need to restart during this process.
If you're still having issues running your Windows-8-compatible game after updating, it's recommend you check for Windows Updates again as some updates are needed before other updates become available.