OK, as with all faults you should start with updating any drivers for your computer.
In this case get the service tag from underneath the laptop and put that information into this site:
http://www.dell.com/support/drivers/us/en/04/DriversHome/NeedProductSelection
I did see a couple of "Urgent" updates for Vostro 130, but yours is a 131. So the service tag will get you to the right place on the Dell support site.
Once you have updated all the drivers let us know.
Hope this helps.