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:
• Turn Off Windows XP Service Pack 2 Firewall
• Configure Windows Indexing Service for Performance
• Make Windows 10 File Explorer Open to This PC instead of Quick Access
• Cortana, Assistant or Spy?
• Windows Event Logs for Maintaining or Troubleshooting Your PC
• What is the difference between MSI and EXE Installations?
• Choosing a Tape Drive
• Kill The Messenger (Service)
• How to Configure the msdos.sys file
• Put HyperTerminal on Windows 7
