I lost my thumbnails in Explorers 'Web Page' after installing QuickTime
2.03 for Windows.

After reading 'recovering thumbnails' I changed the registry key for *.jpg
files but the thumbnails have not come back.

I transferred the files to another computer and hey presto the thumbnails

On the errant computer, in Explorer using Icon view I get the Windows logo
on a white page whereas the other computer shows the PhotoShop icon and get
a thumbnail preview.

What else can I try