Upgrade to Windows 8
Downloading Windows 8 over a metered Internet connection
Add features to Windows 8: FAQ
Why can't I activate Windows?
What are the Windows 7 system requirements?
32-bit and 64-bit Windows: frequently asked questions
Is my PC running the 32-bit or 64-bit version of Windows?
Installing and reinstalling Windows 7
Windows installation problems: frequently asked questions
Install more than one operating system (multiboot)
Install Windows 7 Service Pack 1
What's included in Windows 7 Service Pack 1 (SP1)
Troubleshoot problems installing Windows 7 Service Pack 1
Invalid Windows product key
Activation error 0xC004F061
Upgrading from Windows XP to Windows 7
Upgrading from Windows Vista to Windows 7
Which version of the Windows operating system am I running?
Upgrade to another edition of Windows 7 by using Windows Anytime Upgrade
How do I activate Windows?
Activating Windows: frequently asked questions
Installing and reinstalling Windows Vista
Learn how to install Windows Vista Service Pack 2 (SP2)
What's included in Windows Vista Service Pack 2 (SP2)
Troubleshoot Windows installation problems
Upgrading from Windows XP to Windows Vista
Upgrade to another edition of Windows Vista
Troubleshoot activation problems
Where do I find my Windows product key?
Install Windows XP
Move files and settings to a new computer running Windows XP
Set up Windows XP for multiple input languages
Get answers to your questions in the Windows forum.
Get help from a support professional by phone, email, or chat.
Developers
Designers
Small business
Enterprise
Students
Windows downloads
Windows themes
Wallpapers
Free antivirus
Photo Gallery
Movie Maker
Language packs
Windows service packs
Windows Product Guide
Windows 8.1 Preview
Windows 8
Windows RT
Internet Explorer
SkyDrive
Outlook.com
Windows 7
Windows Vista
Windows XP
Hotmail
Messenger
Microsoft Security Essentials
The Windows Blog
Windows newsletter
Upgrade Windows
Windows 8 tutorial
Microsoft account
Start screen
App
Windows Store
Online storage
Internet Explorer 10
Windows Defender
Free downloads
Browse support by category
Browse support by product
Contact support
Microsoft Community
