Afsluiten vertragen in win xp

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Na lang zoeken heb ik nog geen duidelijk antwoordt gevonden , wie weet hoe je de afsluittijd kan vertragen in windows xp.
Dit omdat mijn pc te snel afsluit en niet alles weg kan schrijven af en toe, zodat ik bij het opstarten regelmatig bestanden mis.

[Han]

Zoiets?:

Increase Shutdown Time So That Processes Can Quit Properly in Windows XP

WARNING : If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To prolong this time-out period, you can modify a registry value. The default time-out value (20 seconds) is stored in the WaitToKillAppTimeout value in the following registry key:
HKEY_CURRENT_USER\Control Panel\Desktop
This value is expressed in milliseconds. You can use Registry Editor to modify this value and then restart the computer for the change to take effect.

NOTE : In general, it is best to refrain from increasing the shutdown time. For example, if your computer loses power, your uninterruptible power supply (UPS) may not be able to provide backup power for the computer long enough to allow all the processes, as well as the operating system, to shut down properly.

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dat was het bedankt!