It is possible to configure thumbnails quality (Will also affect the size of the cache):
Note in Windows 98/Me/2000/XP the thumbnail view depends on these DLLs, and if unregistered the thumbnail view is disabled:[HKEY_CURRENT_USER\ Software\ Microsoft \ Windows\ CurrentVersion\ Explorer]
ThumbnailSize = 96 (Default, 96, Range 32-256)
[HKEY_CURRENT_USER\ Software\ Microsoft \ Windows\ CurrentVersion\ Explorer]
ThumbnailQuality = 90 (Default = 90, Range 50-100)
More Info MS Technet
More Info MS Press: XP Registry Guide
Note in Windows XP the thumbnail cache can be disabled completely with this DWORD registry key:regsvr32 /u shimgvw.dll
regsvr32 /u thumbvw.dll
More Info MS KB272969
Note in Windows XP the thumbnail cache (and the thumbnail view) can be disabled for network-drives and -shares with this DWORD registry key:[HKEY_CURRENT_USER \Software \Microsoft \Windows \CurrentVersion \Explorer \Advanced]
DisableThumbnailCache = 1 (Same as "Do not cache thumbnails" in Folder options)
Note in Windows XP when holding down the SHIFT key while opening a folder in thumbnail view, then the picture titles and filenames will not be displayed and will give more room for the thumb nails.[HKEY_CURRENT_USER \Software \Microsoft \Windows \CurrentVersion \Explorer \Policies]
NoDetailsThumbnailOnNetwork = 1
More Info MS KB830903
More Info MS KB176882
More Info MS KB192573
Credits Tlab404.com
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