WMIC (Windows Management Interface Command) is a command line tool that returns information about the system where it's run. To open a command line shell, at the bottom of the screen, left side of the taskbar, in the Windows search text box, type cmd. To learn your computers model, vendor, and serial number, type the command shown below at the command prompt.
wmic csproduct get name,vendor,identifyingNumber

Perfoming an online search with the name and vendor information provided will return loads of information allowing you to find upgrade, troubleshoot, or repair your computer.
More Windows Administration Information:
• Common Issues With Windows Firewall
• How to Manually Register DLL in Microsoft Windows
• Disable Automatic Wireless Configuration in Windows 7
• Three Important Techniques for Securing a Wireless Network
• Network Security Through the Principle of Least Privilege
• Create and Change Password, Picture and User Name in Windows 7
• How to Audit Security Permissions and Access Rights in Active Directory
• FreeDOS
• PC Technician's Software Copyright Responsibilities
• Windows Server 2003 Active Directory and Network Infrastructure
