Hi,
I would suggest you to generate the System Health Report to check if system is working properly. To run the System health report, follow the below steps.
1. Click on Start
2. Go to Control Panel
**3.**Go to Performance Information and Tools
4. Look for Advanced Tools in the left panel of the Window.
5. Go to Generate a system health report
You can also check the status of the hardware devices in the Device manager. Follow the below link for more information on Device manager.
http://windows.microsoft.com/en-US/windows-vista/Open-Device-Manager