Win7 taskbar thumbnail is missing how to solve

Long before Microsoft officially launched the Windows 7 operating system, it has won the favor of many users with its rich new features and cool display effects. For the "real-time taskbar thumbnail preview" function, Microsoft is still very interesting, basically supported in all Windows7 versions. As long as the user moves the mouse over the taskbar, a preview thumbnail will appear and the visual effect will be unique.
But I don't know when, the taskbar preview thumbnail suddenly disappeared. Move the mouse to the taskbar and it will become a line-by-line text title. It looks awkward.

So, how can I get back to it? Since the previous thumbnail preview can be used normally, the hardware should be supported. As long as the relevant hardware and drivers are working properly, this problem is well solved. Just change the relevant settings. Let me introduce this method for everyone.
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.

2. Open a folder with images, right click on “View”, change the view 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" to find "folders and search options" in the drop-down menu of "Organization", and find "always show" icon in the "View" option, never show Remove the checkmark before the thumbnail " option, then click OK.

4, right click on ”computer"click"property" "advance""advanced system settings", then click on the "Advanced" tab" performance “set> “Show thumbnails instead of icons & rdquo; options, click OK.
5. Rebuild Thumbnail Cache
In the "Start Search Bar"""Disk Cleanup", then press Enter to open the Disk Cleanup Tool and select the system drive letter (eg C:) , OK, pop-up dialog box computer time does not need to hang, and then only select "thumbnails", click OK, confirm in the pop-up box "delete file".

After clearing these icon caches, open the file again and the thumbnails should be back to normal.