Configure size of Windows XP Thumb image

You can change the image size in the thumbnail view by using this method. Always remember registry editing is a risky process. If not carefully done, you may end up with an unusable system.
Start>Run
Type regedit
Browse to the following key
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer.
Add a ThumbnailSize Value Name, a REG_DWORD data type, and set the data value to a number between 32 (small) and 256 (large), using the Decimal radix.
The image size must be a mutiple of 16
To make it available to all users edit the follwing key
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer. instead of the above mentioned one.