An upgrade moves your PC from a previous version of Windows—such as Windows 7 or Windows 8.1—to Windows 10. This FAQ is intended to answer questions about upgrading to Windows 10.
An update ensures you have the most recent features and security improvements for your current version of Windows. If you want to update your device and need more info, see Windows Update: FAQ.
If you’re looking for information about an error message you received when upgrading or installing Windows 10, see Get help with Windows activation errors. Once you’re there, press CTRL+F, and type or paste the error code to find specific information about the code and how to resolve it.
The following are some answers to questions you might have about the upgrade to Windows 10.
For more info about system requirements and feature availability, see the Windows 10 specifications page.
If you receive an error code and none of the info below helps, see Get help with Windows activation errors.
The time that is required to upgrade to Windows 10 depends on factors such as the age of your device and how it’s configured. Most devices will take about an hour to upgrade as soon as the download is completed. Although older devices could take longer, some newer, high-performance devices might upgrade faster.