Hi,
I would suggest you to update the drivers for your hardware devices from the manufacturer’s website and check
if it helps.
Download the drivers from the below website and try installing and check if it helps:
http://esupport.sony.com/perl/swu-list.pl?mdl=VGNSZ430N
Also refer this link:
http://windows.microsoft.com/en-us/windows7/Update-a-driver-for-hardware-that-isnt-working-properly
I would also suggest you to refer this link for more information on
conserving battery power:
http://www.microsoft.com/atwork/maintenance/battery.aspx
As a work around you can also try these steps:
1.Click Start and type device in the search field, then select
Device Manager .
2.Expand the Batteries category.
3.Under the Batteries category, right-click the Microsoft ACPI Compliant Control Method Battery listing, and select
Uninstall .
WARNING : Do not remove the Microsoft AC Adapter driver or any other ACPI compliant driver.
4.On the Device Manager taskbar, click Scan for hardware changes .
Alternately, select Action > Scan for hardware changes .
Please respond and let us know the status of the issue.
Azam – Microsoft Support.