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unvysc
Paper Tape
Posts: 2
Registered: ‎07-02-2010
Location: US
Views: 761
Message 1 of 1

Laptop freeze whenever I disconnect power

My SL510 with Win 7 got this issue recently. It freeze whenever I either unplug the brick from AC power or pull the connector from the laptop. If I only use the battery to start windows. It hangs at the welcome screen. 

 

I tried boot to BIOS and Win 7 safe mode. It works fine in both without such issue.

 

Whenever I tried to change power plan in lenovo power manager or windows power option, it freeze. I disabled power service and restart windows. It works fine but there is no power plan anymore.

 

I uninstall Lenovo power manager driver and Lenovo power manager and reinstall the newest, it don't help.

 

I believe that in one of the windows updates of last few days, some thing wrong happed to my OS, but I couldn't know what happed exactly and how to fix it.

 

Could anybody give me some suggestions here?

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