When we browse images in the explorer, sometimes you may find that the thumbnail size in windows is too small or too big or the quality of the thumbnail is not good enough. You can take the following steps to change the thumbnail size and quaility.
1. Backup your registry.
2. Click Start.
3. Click Run.
4. Type regedit and click Ok.
5. navigate to
HKEY_CURRENT_USER\ Software\ Microsoft \ Windows\ CurrentVersion\Explorer
6. Create two new DWord Value by right clicking and select "new->DWORD value" and name one as "ThumbnailSize" and other as "ThumbnailQuality"
7. Select Decimal Value and set values for both, ThumbnailSize can have values 32 - 256 and Thumbnail Quaility can have values 50 - 100.
8. Close registry editor.
9. Open any folder and change the view to Thumbnail and see the difference.
