1 ) Take the DateToIntegr8.vbs script above, (just delete the .txt part of the name) and save it wherever you want, say C:\time. 2 ) Then open a command prompt in that directory. 3 ) Enter the following command: cscript DateToInteger8.vbs "06/09/2014 10:30:00 PM", where the date and time are that of your local time zone 4 ) Use calc.exe (programmer mode) to convert to hex (QWORD) - Enter the output from DateToInteger8, which will be a decimal value, in the calculator in decimal mode, then switch modes to hex to see the hex value you need. 5 ) @KEiGHT, in his local time zone got: 1CF842195DB5400 6 ) You can validate that the value you have is correct by entering in the command prompt: w32tm /ntte 0x1CF842195DB5400 7 ) @KEiGHT, in his local time zone got: 151004 20:30:00.0000000 - 6/9/2014 10:30:00 PM 8 ) Zero pad the value from the calculator to get 16 digits: 01CF842195DB5400 9 ) The leftmost 8 digits will be the highpart (01CF8421) and the rightmost 8 digits will be the lowpart (95DB5400). I'm not sure if the date displayed in the OS version selection window is that of your local time zone or GMT, so you might have to adjust the values you enter above slightly, but since the output from w32tm includes GMT you should be able to figure out what you need to change. So you found the .xml file where you need to enter this revised value? Where is it? Cheers and Regards