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:
• Windows PC Performance Troubleshooting and Optimisation
• How to Erase a Hard Disk Drive Permanently
• How to Setup DHCP (Dynamic Host Configuration Protocol) on a Windows Server
• Planning a Backup and Restoration of Files for Disaster Recovery
• Font Basics
• Use Free Autoruns Utility to Disable Unnecessary Startup Programs
• How to Share a Printer
• Common Issues With Windows Firewall
• Computer Technician's Guide to Electronics Disposal and Recycling
• How to Share a Folder in Windows 7
