There is seriously a known issue with SEP 12.1 with Windows XP SP3 (x86), SEP 12.1 RU1 on Windows XP SP3 (x64) and Windows 7 Pro SP1 (x64).
Many colleagues who bought the last version reported me roll back issue even on new computer with no software/no security tools at all previously installed.
The most surprising is especially roll back of SEP 12.1 RU1 installation on Win7 Pro SP1 x64.
I've been trying some tests to give an hand and no matter the package used, the one from File Connect or one created from SEPM Console, it results a roll back. CleanWipe has been tried and the installation still rolls back.
on SEP_inst.log there is nothing special excepted the basic return code 3 (very known over there).
However on SIS_inst.log (new installation log file, I think), some errors are refering about Bash Drivers. It's like during installation SEP is not able to find out a directory for this drivers and then a script execution fails after.
I'm not sure but if Bash drivers fail to install then many other drivers fails as well cause I noticed after there are failure with other drivers of SEP. Like a dependancy probably.
UAC and Windows Defender have been disabled and a Local Administrator account with a password set as well.
It would be very helpful if Symantec can provide in forum all the pre-requisites to be able to avoid any roll back installation in this type of situation.
Because I recommended to one of my colleague to contact Symantec Support and they told him it's a known issue and the only alternative is to retrieve Bash Drivers files existing on a computer with same environment and OS to regroup on new Zip folder to rename as the BashDefs.zip folder existing on the default package to replace the one which fails to install.
It's not a solution ... Especially if someone has over 500 laptops like that and he tested to install SEP 12.1 RU1 on 3 of them and the issue has been reproduced on the 3 laptops.
It would be very deceiving if we have to install SEP 11.0 RU7 when SEP 12.1 and 12.1 RU1 were supposed to support much more better the most recent OS. That's not fair.