It happens many times that you try to install SEP or SEPM and at the end it rolls back.
To avoid losing time by guessing what could be the cause of such issue it is worth to find the installation log and look. It gives you much useful information and sometimes helps you to resolve the problem very quickly.
Installation log’s names for the above products are:
sep_inst.log for SEP
sepm_inst.log for SEPM
Usually they are stored in the temporary folders:
C:\Documents and Settings\User_Name\Local Settings\Temp (where User_Name is currently logged user. You can open this temp by typing %temp% in start -> run)
If the installation log will not be found in none of those locations, you can search for those names on your whole disk.
If still cannot be found, you might have to force the...