If you want to change the thumbnail view, particularly for browse by photos and pictures, it can become a bit of a drain on your system.
It is possible to lower the thumbnail size and quality by editing the next registry keys.
Open the registry and find:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
Create a new DWORD value called ThumbnailSize, and set the value between 32 and 256.
And/or create another DWORD value called ThumbnailQuality, and set the value between 50 and 100.
Key Details :
USER Key: [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer]
Value Name: ThumbnailSize
Data Type: REG_DWORD (DWORD Value)
Data Value: 32 - 256
USER Key: [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer]
Value Name: ThumbnailQuality
Data Type: REG_DWORD (DWORD Value)
Data Value: 50 - 100
Your thumbnails will become smaller.
And video:
How to Optimize a computer’s Resolution and Visual Effects (XP)
This is a tutorial that shows you how to change the refresh rate, resolution and tweak the windows effects on Windows Xp.

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