HoloLens periodically checks for system updates so you don't have to. When an update is available, it will be automatically downloaded and installed the next time your device is plugged in and connected to the Internet but isn't in use.
To manually check for updates, go to Settings > Update & Security > Check for updates. If the Settings app says your device is up to date, you have all the updates that are currently available.
Go back to a previous version
In some cases, you might want to go back to a previous version of the HoloLens software. You can do this by using the Windows Device Recovery Tool to reset your HoloLens to the earlier version. Note: Going back to an earlier version will delete your personal files and settings.
To go back to a previous version:
- Make sure you don't have any phones or Windows devices plugged in to your PC.
- On your PC, download the Windows Device Recovery Tool (WDRT).
- Download the HoloLens Anniversary Update recovery package.
- When the download is finished, open File Explorer > Downloads. Right-click the zipped folder you just downloaded, and select Extract all... > Extract to unzip it.
- Connect your HoloLens to your PC using the micro-USB cable it came with. (Even if you've been using other cables to connect your HoloLens, this one works best.)
- The tool will automatically detect your HoloLens. Select the Microsoft HoloLens tile.
- On the next screen, select Manual package selection and choose the installation file contained in the folder you unzipped in step 4. (Look for a file with the extension .ffu.)
- Select Install software, and follow the instructions to finish installing.
If the tool doesn't detect your HoloLens, try restarting your PC. If that doesn't work, select My device was not detected, choose Microsoft HoloLens, and follow the instructions.