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Sony VAIO PCG-748 Won't Turn Off After Windows Shutdown - The Solution

My Sony VAIO PCG-748 notebook has been running happily with Microsoft Windows XP for quite a few months now. It's quite peppy for a 266 MHz computer. The only gripe I have with it is that whenever I shut it down, it ends up at the following "It is now safe to turn off your computer" screen, but the computer stays on.

I've been quite frustrated with this problem. Today, I finally took some time to figure it out. Based on this Microsoft tech article, all I have to do is to enable APM. You can do that by going into "Control Panel" -> "Performance and Maintenance" -> "Power Options" -> "APM". Then check the box next to "Enable Advanced Power Management support."

I tried it and it works! My Sony VAIO PCG-748 automatically turns off after shutting down Windows XP. That is wonderful. I wonder why this option isn't enabled upon installation of Windows XP.

Chieh Cheng
Thu, 24 Jan 2008 02:08:30 +0000

i experienced the same problem with Windows XP on my Sony VAIO PCG-505R SuperSlim notebook. The solution presented earlier worked for this computer too.

Chieh Cheng
Wed, 14 May 2008 09:18:16 +0000

Your APM trick worked for this Sony VAIO PCG-Z505S also. I was having the same problem after upgrading it from Windows 98 to XP sp3. I spent the last 1.5 hours looking for a driver or something that might do the trick and was about to give up on it until I found this post. Thanks Chieh!

Fri, 25 Jul 2008 07:38:28 +0000

Open regedit.exe
Browse to this key-
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]

Make sure the following value is set to 1

link[ . . .]

Sat, 19 Mar 2011 12:22:48 +0000

I am going through the same problem. My Vaio laptop does shuts down(i.e; the screen does goes black) but the power button keeps on glowing and I can hear the fan inside. I can turn it off my pressing the power button for atleast 10 seconds. The only difference is I have Windows 7 and I can't find Advanced Power Management Support in my power options. Can you please help me out?

PS: the value of the registry "Power after shutdown" is already set to 1. The problem still occurs.

Thu, 08 Mar 2012 11:35:18 +0300

I have the same problem -- running Windows 7 Professional on my brand new Sony Vaio S series. It seems as if my won't-shut-down problem started after i installed Citrix software to allow me to access my work desktop remotely. Could they be related? Thanks.

Tue, 13 Mar 2012 02:12:42 +0300

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