What's new in Windows 8.1 Update and Windows RT 8.1 Update?
Windows RT 8.1: FAQ
Why can't I find the update in the Store?
Getting started tutorials for Windows
Tips to free up drive space on your PC
No sound in Windows
Wired and wireless network problems
Setting up email
Forgotten password or other sign-in problems
Getting started with OneDrive
Getting started with Internet Explorer 11
Troubleshoot problems with installing updates
Update to Windows 8.1: FAQ
Why can't I activate Windows?
Upgrade to Windows 8.1 from Windows 7
Learn how to install Windows 7 Service Pack 1 (SP1)
Getting started with Windows 7
Install and use Windows XP Mode in Windows 7
Account temporarily blocked
32-bit and 64-bit Windows: frequently asked questions
Why can't I switch back to Hotmail?
Make Internet Explorer your default browser
How do I install or uninstall Internet Explorer 9?
Upgrade to Windows 8.1 from Windows Vista or Windows XP
Learn how to install Windows Vista Service Pack 2 (SP2)
Fix printer problems
Block or allow cookies
Check your hard disk for errors
As of April 8, 2014, support and updates for Windows XP are no longer available. Find out how to stay protected.
Product key, activation, installation, upgrade, add features …
Mail, contacts, calendar, people, Skype, Outlook.com …
Search, swipe, tap, charms, mouse & keyboard, desktop …
Media streaming, sound, photo editing, camera, CD burning …
Start screen, backgrounds, language settings, Narrator, Magnifier …
OneDrive, storage plans, sharing files and folders, Recycle Bin …
Microsoft account, passwords, viruses, Family Safety …
PC reset or refresh, File History, System Restore, safe mode …
Installing apps, billing, using apps on multiple PCs, troubleshooting apps …
Printing, Bluetooth, USB, monitors, streaming …
Wi‑Fi, web browsing, Internet Explorer, HomeGroup, broadband, sharing …
Windows Update, Action Center, Task Manager, power plans …