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 info on a specific error code, see Get help with Windows activation errors. There, you can press CTRL+F and type or paste the error code into the search box to find specific information about your code and how to resolve it.
For more info about system requirements and feature availability, see the Windows 10 specifications page.
The following are some answers to questions you might have about the upgrade to Windows 10.
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.