Attention! Author of this guide is not responsible to any damage you got when unlocking! Only for 4.4! Warranty will void! MicroSD (external) storage may not work in CWM! You won't be able to flash original Acer updates!
1. Download and unpack "Drivers.zip".
2. There are two executable files:
2.1 Run install_driver.exe as Administrator if your OS is 32-bit.
2.2 Run installdrv64.exe as Administrator if your OS is 64-bit.
3. Wait 2 minutes. There's no feedback from installer.
4. Reboot PC and connect turned-off tablet to it. New drivers may be installed.

Guide #2: Preparing to serious work.
1. Backup all your data!
2. Copy all available MAC-addresses!
3. Charge your tablet on 100%!

Guide #3: Unlocking bootloader and installing CWM.
1. Download an archive and unpack it in short path, for example in C:/
2. Launch "/SPFT/flash_tool.exe".
3. Load scatter from "/810 Unlocking and CWM/".
3.1 If Rescue folder is being used, load scatter from "/Rescue/".
4. Press Window ? Write Memory. One more tab will appear, open it.
5. Press "Open RAW Data...", choose "/810 Unlocking and CWM/secuoff.img".
6. Memory type: EMMC.
7. Start Address: 0x3D80000.
8. Copy "File Size (bytes)" to Container Length field.
9. Press "Write Memory".
10. Connect your turned-off tablet to PC.
11. Progress bar will fill with red, then with dark green.
12. After this you will see a green circle.
13. Disconnect the cable. DO NOT try to turn your tablet on!
14. Go to "Download" tab.
15. Check files:
PRELOADER "/810 Unlocking and CWM/preloader_unlock.bin"
RECOVERY "/810 Unlocking and CWM/recovery.img"
If you are using Rescue folder:
PRELOADER "/810 Rescue/preloader.bin"
RECOVERY "/810 Rescue/recovery.img"
SEC_RO "/810 Rescue/secro.img"
16. Press "Download" and connect the cable again.
17. Progress bar will fill with red, then with purple, then with yellow.
18. After this you will see a green circle.
19. Disconnect the cable, wait 5 seconds and try to turn it on!
19.1 If all was booted OK, try to boot in CWM.
19.2 If A1-810 is not reacting to Power button, then run Guide #3 using Rescue folder.
19.3 Stuck on Acer logo? Press Reset and retry!.