Do not cache thumbnails
[[Disables automatic storage of folder thumbnails in a cache file. When you
store thumbnail images in a cache file, Windows can reuse them instead of
creating new ones every time you open a folder. If you disable this
automatic storage function, folders that contain thumbnails might take
longer to open.]]
This disables the cache, not the thumbnails themselves.
Check this setting:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advance
d
DisableThumbnailCache REG_DWORD 0x00000001 (1)
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Go here:
http://www.kellys-korner-xp.com/xp_tweaks.htm
Download all three.
184. Disable Thumbnail Cache
277. Enable or Disable Thumbnail View
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Try this.
1. Make sure Thumbnail Cache is disabled.
Check the Registry setting.
2. Disable Thumbnail View.
3. Delete thumbs.db
4. Reboot.
5. Set quality of the thumbnails (TweakUI?)
6. Enable Thumbnail View.
7. Thumbs.db will be recreated.