If the above doesn't work I would like to try the following 2 things. Please do one and report back if it helped or not.
Tutorial for running chkdsk in Win 7 located HERE
Please Run the PCPitstop.com OverDrive Full Tests
You must use your Internet Explorer for this procedure. (doesn't work so well in Firefox or others). If your machine is running Vista or Windows 7, you must Select IE to “Run as Administrator”. After completing PCPitstop OverDrive you can close your IE browser and re-open it Normally so that you are no longer running as administrator.
Go to: http://www.pcpitstop.com
Click on "Free Computer Check-up
" listed below PC Pitstop OverDrive
In the User Login - Click on "Sign up FREE!
You'll need to submit a valid email address and create your own password, then click - Create Account(button)
Now enter your email address and password to Log in, Select - Scan this system Now!
You will then be asked to download an ActiveX component and allow it to install.
It is safe and does not compromise your privacy.
Follow the on-screen prompts to install the ActiveX and to allow the Full Tests to be run on your machine.
The Full Tests take about 2 1/2 - 3 minutes on most machines.
When complete, a Results - Summary - Recommended Fixes
will be displayed.
Please post the URL internet address, from your Results, back here into this Topic Thread so that we can review the configuration and present performance levels of your machine.
Note: During the graphics 2D and graphics 3D testing, your screen will display some rapidly moving objects.
If you are sensitive to visual flashing, it may cause dizziness. Therefore, look away from the screen during that portion of the testing.
After reviewing the results we will be more informed and may be able to provide better recommendations for you to work towards improving your machine's performance.
While PCPitstop does offer a variety of Paid Products, the PCPitstop OverDrive testing is FREE. Please ignore the references to Paid Products. At WTT we prefer to provide manual solution instructions that you can apply directly to your machine.
Finally when this happens is it during playing a game or just doing normal stuff?
If during game play please right click on the game icon and see if there is a Run in compatibility mode