Using Office 98 on XP

Having recently upgraded from win98 to xp I am having the following problem

The following line works perfectly in win98 but fails in XP

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Shell "start """ & Range("G1").Value & "\test.htm"""
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The error message is
run time 53
"File Not Found"

Cell G1 contains ... C:\Images\Preview

Note their is nothing a matter with the specified path nor the file in the
relevant folder!

Remember this works perfectly in win98