Issues With Inspiron 5110

Hi EveryOne ..

I have Inspiron 5110 Core i3 ..

I am having some issues with my laptop ..

First Thing Is When I Go In BIOS Mode My System Freeze After Few Mints ...

Second Thing Is When I Try To Install Genuine Window 7 Just After Completing Installation My System Throw ACPI Compliant Error ...

But Trial Window Is Running And In Trial Mode When Shutdown My PC Operating System Shutdown But Hardware Remain On And Thats Why I have To Off My Hardware Maually...

Please Guide Me What Should I Do Now ...