I'm also waiting for the fix. Just in case anyone from Microsoft can use the information, here's my experience in following the instructions to manually resize the WinRE partition:
- on an old laptop running Win10 Pro and an AMD A8-5545 CPU, mechanical hard drive, the process worked perfectly.
- on a desktop running Win10 Pro, a Core i5-7640X CPU and an SSD, I got the error message saying the system partition could not be shrunk -- even though there are hundreds of Gb unused on the drive. No joy.
- on a laptop running Win10 Pro, a Core i5-4300U CPU and an SSD, initially the WinRE partition was 510Mb. I went through the process of shrinking the system partition, then deleting and re-creating the WinRE partition and got no error messages -- but the newly created WinRE partition was again 510Mb! The process had not used the newly freed space to create a larger WinRE partition. Since the table created by the "list partition" command only shows partition sizes in whole Mb or whole Gb, I cannot tell whether the system partition (100 Gb) really was shrunk by 250 Mb or not. After a reboot I tried the process a second time, same result. I have no idea why.
I've spent too much time on this already. Waiting for the fix.
BTW, I do use BitLocker to encrypt USB thumb drives, and then to read the encrypted thumb drive. Am I at risk until this gets fixed?