Forefront TMG 2010 (5)-reinstaller prompts that ADAM cannot be installed

TMG was deleted some time ago, and now when you want to install it for use, it prompts the following error

The installer cannot install ADAM as shown below:

The solution is as follows:

1. Rename or delete existing folders.

Please delete or rename the "Microsoft Forefront Threat Management Gateway" folder in the C:\ Program Files folder, and then rerun Forefront TMG's installer to complete the installation.

2. Modify local group policy. -(the server has joined the domain)

Press the operation in the following figure to change the three items that are framed to disabled.

3. If you can't do it again, you can try to install ADAM.

The command is as follows:

Restart the computer, and then install the OK.

Also save the other documents found, and back up:

Several failures of reinstallation errors after Forefront TMG uninstallation

Install TMG2010 Times setup failed to install adam.\ r\ n (0x80074e46)