Initially, Enterprise Enrollment allowed you to sign in with a personal email address and the company would not restrict access, with a personal email address. However, eventually there were more restrictions. Eventually, I couldn't browse social media sites. Then, I began to receive a message that stated, I was not authorized to access the device with my personal credentials. Even though it was my laptop, that I purchased with my own money. Ultimately, I decided to install Chrome OS Flex, without Enterprise Enrollment.
To uninstall Chrome OS Flex Enterprise Enrollment, plug in your OS Flex USB installer. Next, boot into the bios Boot Manager, by repeatedly pressing F7. However, your function key may be different, depending on your brand of computer [check with your manufacturer]. At first, I had UEFI enabled and I tried to boot into the USB hard disk, but it didn't boot. It kept loading the OS. So, then I switched USB ports and it still didn't boot to the installer. Ultimately, I had to disable UEFI boot and enable legacy boot. Then it worked. I'd like to place a disclaimer: I may haven been impatient and did not wait long enough. But I eventually switched to legacy Boot and disabled UEFI in the bios. So, UEFI could possibly be enabled and still work to reinstall Chrome OS Flex. But it didn't work for me.
Once you boot to the USB, using your Chrome OS Flex USB installer, you will see the chromeOS Flex logo, which loads for several minutes. It may take 3 minutes or so for it to load. So be patient! Afterwards, you will be prompted to install Chrome OS Flex on the computer or choose to boot it directly from the USB stick.