Windows Activation FAQ: How do language, version, 64-bit or 32-bit, and source affect ability to install and transfer Windows licenses?
Problem
We get a lot of questions on Super User about Windows activation and licensing. This question is an attempt to answer the most common questions in one place with a canonical answer. When reinstalling Windows, the following questions often come up: Can I transfer the copy of Windows from my old computer to a new one? Does the license key on the sticker on my computer work on any computer? If I have a 32-bit version, can I install a 64-bit version? I have an OEM version of Windows, but only a retail disk. Can I still use it? I want to install Windows with a different language. Do I need a new license in that language? I changed some hardware. Will I be able to reactivate my computer? Can I back up my activation before doing a reinstall? How many computers can I install my license on? Do I have to deactivate my old installation before transferring a license? If so, how? How does licensing work in Windows ? What are the restrictions on transferring, reinstalling, and changing versions of …
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Fix for: Windows Activation FAQ: How do language, version, 64-bit or 32-bit, and source affect ability to install and transfer Windows licenses?
Disclaimer: this information is not guaranteed to be correct. When in doubt about licensing, contact Microsoft's activation hotline for assistance. Super User is not responsible for legal repercussions resulting from your choices with licensing and activation. For more official information from Microsoft, see the Microsoft Product Activation Solution Center. Overview: how can a license be used? A single Windows 7 license can activate several different types of installations. Here is a quick ref…
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