this fix seems to work:
edit the file located above, which for me is:
C:\Users\Jim\AppData\Local\Microsoft\Windows
Sidebar\Gadgets\Uptime.gadget\en-US\core\core.framework.vbs
Change:
Function WMIDateStringToDate(dtmBootup)
WMIDateStringToDate = CDate(Mid(dtmBootup, 5, 2) & "/" & _
Mid(dtmBootup, 7, 2) & "/" & Left(dtmBootup, 4) _
& " " & Mid (dtmBootup, 9, 2) & ":" & _
Mid(dtmBootup, 11, 2) & ":" & Mid(dtmBootup,13, 2))
End Function
to
Function WMIDateStringToDate(dtmBootup)
WMIDateStringToDate = CDate(Mid(dtmBootup, 7, 2) & "/" & _
Mid(dtmBootup, 5, 2) & "/" & Left(dtmBootup, 4) _
& " " & Mid (dtmBootup, 9, 2) & ":" & _
Mid(dtmBootup, 11, 2) & ":" & Mid(dtmBootup,13, 2))
End Function