I have a Win 8.1 laptop that was running TM Max Security but is not able to be upgraded to 2018. The install hangs at the first step of Checking the Computer. Installing both the TM permissions and remove remnants utilities have been performed. Windows Defender is turned off as well as UAC.TM was completely uninstalled now.
However laptop continues to hang when checking the computer when install Max Security 2018.
Upon reinstalling an old version of TM from disk, the installation works perfectly but am unable to activate the new license as it complains this is a too old version of Max Security.
So now I have an unprotected computer!