1, no thumbnails and graphics driver and system optimization related, if the drive is normal, then it is possible that you use System optimization software to cause some service shutdown caused.
2, Windows7 Home Normal version of the interface is very ugly, and a lot of Windows7 features are not, I give you a suggestion, you this Windows7 pre-installed family version can be free to upgrade to the flagship version. There is no cost to pay. Upgrade about 10 minutes.
3. Upgrade method Computer Properties Windows upgrade anytime
Follow the prompts step-by-step input to the flagship version of the key can be, Windows7 flagship key can be Baidu search, you can also give me a message I sent you.
4, after the upgrade Windows7 function comprehensive, performance promotion, transparent window and preview will look very beautiful.
5, if there is no thumbnail, then you should update the graphics driver.