I can't update the build 17738

I'm having the same issues, but I THINK I finally got past this problem with not being able to download and install only to now, after the final restart, having a bigger issue after I log in. Now all I get is a gray screen. It flickered and displayed my wallpaper for about 2 seconds, then went back to the gray screen. I've done a hard shut down several times and get the same result. Very strange and annoying.

Same issue on my Asus ( Tried 3 times). On the last phase , it reboots at 69%, returns to ask me to restart to complete the update but yet returns me to the current build 17733. On my 7th consecutive build, first time it can't install.