Since some of the earlier versions of Windows 7, there has been a problem with sawtooth playback of video files. Even watching online video files, such as popular, Uusee and thunder to see, there are similar problems. At first, many users thought it was RealPlayer, Storm audio and video, Thunder to see the Player and Windows 7 compatible with the bad, but later, users found that other audio and video player problems still exist.
In general, Windows 7 playback of audio and video files appear mosaic, blur, and sawtooth problems, and graphics drivers, such as poor compatibility, or drive mixing, can cause such problems. Before the graphics manufacturer and Microsoft Official to solve the problem, the author gives a temporary solution, it may be able to solve your "immediate".
In the Control Panel, enter system → advanced system settings (Figure 1) in turn:
Switch to the advanced option in the pop-up dialog box, and click the Settings button in the performance area (Figure 2):
Finally, under the Visual Effects tab, cancel the "Enable desktop combination" of the system default check (Figure 3):
After the modification is complete, save the settings and exit.
You need to be reminded that the use of Windows 7 Aero effects may be affected by canceling the "Enable desktop Combination" option on the system default check. Therefore, after you have finished reading the AV video file, you also need to reset the "Figure 3" in the change back.