I bought a W4 last week and played around with it for a few days before deciding to plunge into installing Windows 10...So I did the following...
1. I created a recovery usb flash with the given tools.
2. Went to Windows update and tried to Install, but got an error saying it's not compatible because the OS is installed on a compressed drive. I still can't figure out why Acer has done this way, considering I have a 64GB device, not 32 or 16
3. Then downloaded the TP iso but that also gave the same message.
4. Then found out that if you use the "setup.exe" under the "Sources" folder, it will skip the check and install...
5. That worked. And the installation took about 45-60 mins.
6. And pretty much useless because touch screen wasn't working...And I don't have a spare keyboard, just have a USB mouse...
7. So connected the mouse over OTG and reset the device using a pin.
8. Then when it booted back, used the accessibility keyboard to complete the setup.
9. I had the Windows 8.1 driver setup from Acer on a MicroSD. Used that to install the drivers...
10. After a reboot, touch screen working fine...but very very clumsy and buggy...
11. The build overall is not smoothened out for touch only tablets...
12. Login PIN can be setup, but no option to enter pin at the login screen...
13. Entering a complex password is super difficult with keyboard not behaving correctly...and PIN doesn't work.
14. For local accounts option to enter a PIN is shown, but doesn't work.
15. Haven't tested with Image passwords.
16. I absolutely HATE the new Start Menu...8.1 was gorgeous to look at on a Tablet esp Metro mode...
17. Native Windows still don't respond very well to touch...
18. So, after some time decided to go back to 8.1
19. Surprise, Surprise, my recovery microsd is Dead...
20. Downloaded a Windows 8.1 ISO Single Language and try to install that, the Acer Windows Product Key doesn't work..Great !
21. There is absolutely NO WAY to use the 6GB recovery partition which still exists because you can't remove it..to restore 8.1
22. Went over to the Acer Service Center and the nice folks there have agreed to restore on Monday.
23. Meanwhile, since I have 10 on my W4, exploring it.
24. Bottom line : Windows 10 TP is not yet ready for daily use, you can still squeeze usage out of it, but it will be a determined effort.
I will stick to 8.1 Update 1 until probably GA.