Immediately after the W 10 Anniversary update, as many of you have experienced, things started to 'freeze' that had never frozen before. It began with any NOTIFICATION freezing in the bottom right of the clipboard and whatever page I was on that was behind the Notification would also freeze. The only way to get things unfrozen was to reboot each time. I called Surface Tech Support and was fortunate to get a fellow in the Redmond, WA support center. He said this was a "known issue" and that MS had created a Tool to fix the issues but that it was testing this Tool so it has not yet been released as part of the new System Update. It worked for me but with a few issues.
First, here is the official web address to go to. NOTE that there is NO '.com' after the address:
Follow the prompts and it will run through a series of checks and fixes then ask you to Reboot. It may ask you to confirm the time zone you are in. Then, if it has installed correctly and fixed corruption and missing files, it will ask (like it did for me) to check the option to perform a new System Update. I did that and rebooted two times. HOWEVER, after performing these actions which took about 40 minutes on my 512 Surface Book, the MS Tech had me go to the Troubleshooter and run, as Advanced/Administrator, the Troubleshoot problems with Windows Update. It came back that there were still missing or corrupt Registry Files and I was directed to choose the option to APPLY FIX. I did that and all the freezing has stopped.
HOWEVER... There is a new issue that I believe is a result of this Selfhealing patch. There is now random FLASHING of the screen - the same kind of flash you see when you reload the entire OS either via Recover from the cloud or using a USB stick recovery image. The flash I describe shows the rectangle box that you see in an instant when you reload the OS. MS is aware of this. This had never happened before (random flashing like it is reloading the OS) until I applied the Selfhealing patch.
The Flashing is happening less today but it happens. I still think applying this process is worth it because all the freezing has stopped.
My SRX case remains open and Tech Support is following up with me tomorrow.
I hope this helps.