On the desktop, click "Start-Control Panel" once, as shown in the picture:
Change the view to large icon in the Control Panel interface, and then locate the Admin tool and click Enter, as shown in the figure:
In the new window that pops up, select Windows Memory Diagnostics and double-click enter, as shown in the figure:
Then choose when to start testing, generally we choose the recommended "immediately reboot and check the problem" can be, as shown in the figure:
After clicking the system to automatically reboot, and then into the Memory diagnostics work interface, we just wait for the diagnosis to end, as shown in the picture:
The above is the Win7 system memory Diagnostics method, this system comes with the Windows memory Diagnostics is a very efficient and free memory diagnostic tool, you want to test the memory may wish to try this method.