Mettere un titolo come ad esempio "Visualizzare anteprima pagine web", no eh??
Ad ogni modo, tratto da un articolo Microsoft:
If you install Windows XP, you may not be able to view some Web content files in Thumbnails view in the My Computer window or in Windows Explorer.
CAUSE
For stability and performance reasons, Windows XP makes Thumbnails view unavailable for the following file types:
a. HTML documents (.htm and .html files)
b. XML documents (.xml files)
c. Internet e-mail messages (.eml files)
d. Internet news messages (.nws files)
