About Win7 system, the thumbnail can not be displayed solution

Recently, there are a lot of feedback from users of 360 security guards. The win7 system thumbnails cannot be displayed. Due to the number of users who contact, I will share this problem solution with everyone, hoping to help you with the same problem.
1, please check the remaining space of your C drive immediately. If there are only a few hundred megabytes or tens of megabytes, please clean up the useless files of the C drive or transfer the useful files to other disks. This way the thumbnails will display properly. It is recommended that the system disk keep the remaining space of the disk twice the size of the memory. (The cause of the problem is unknown. It is not clear how many megabytes remain is the critical point set by Microsoft.)
2. Open a folder containing images, right click [View], and change the viewing mode. Note: It is normal to not display thumbnails in small icons, lists, or details. Use other viewing methods to display.
3. Double-click [Computer], find [Folder and Search Options] in the [Organization] drop-down menu, and find the [Always show icons, never show thumbnails] option in the [View] option. And click OK.
4, right click [Computer] Click [Properties], select [Advanced System Settings], then click [Settings] in the [Advanced] tab, and select the [Show thumbnails instead of icons] option. Click OK.
5, rebuild the thumbnail cache, type [Disk Cleanup] in the [Start Search Bar], then press the Enter key to open the Disk Cleanup Tool, then select the system drive letter (such as C:), click OK, pop up the dialog The frame computer time does not need to be hung, then only select [thumbnail], click OK, and confirm [Delete File] in the pop-up box.
6, because two users use the 7th floor method to successfully display thumbnails. Hereby refer to “ enter the control panel display, change the system font size to medium. After logging out, change back to the default. ”
2011 4.1, today there is a user part of the thumbnail can not be displayed, this has found a solution, delete the picture that can not be displayed to the recycle bin, and then restore. But there is still a problem, the new image still can not be previewed. Please know why? Or contact me if you have the same problem. Thank you.