Microsoft has received a small number of reports of Windows 10 freezing after installing the Anniversary Update on systems with the operating system stored on a solid-state drive (SSD) and apps and data stored on a separate drive. This issue does not occur when starting Windows 10 in Safe Mode. If you are experiencing this issue, we will be providing updates to this thread...We ask for your patience while we continue our investigation and please check back on this thread for an update."
The company tells affected users to open the Recovery Console and rollback to a previous Windows 10 build or even Windows 7 or Windows 8 if their entitlement still exists. Given the problem stops many users’ PCs from booting correctly, Microsoft offers a solution to do this from Safe Mode:
Step by Step on how to go back to an earlier build
- Restart your PC. When you get to the sign-in screen, hold the Shift key down while you select Power > Restart.
- After your PC restarts to the Choose an option screen, select Troubleshoot > Advanced options > Startup Settings > Restart.
- After your PC restarts, you'll see a list of options. Select 4 or F4 to start your PC in Safe Mode.
- Open the Settings app.
- Select Update & security and then the Recovery tab.
- Under "Go back to an earlier build", click the Get started button and follow the instructions.