07-02-2010 11:47 AM
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?