If you want to install Windows7 32Bit on H110M-BTC, please follow the steps below.
1. Boot up your system, press [DEL] go to BIOS.
2. BIOS -> Chipset -> Mining Mode -> [Disabled].
3. BIOS -> Boot -> CSM Support -> [Enabled].
4. Press [F10], save the modification and exit.
5. After system reboot, you should now be able to install Windows7 32Bit.