A quick post to help those that have been having issues installing XI 3.1 and LCM 3.1 with SP2 on the Windows platform.
It is important that the products be installed in the correct order, otherwise you will have issues with your install.
The correct order should be:
BOE XI 3.1 -> LCM XI 3.1 -> BOE XI 3.1 SP2 -> LCM XI 3.1 SP2
Any fix packs that you want to apply after that must also be done in a similar order. So if you install FP 2.2 for BOE XI 3.1, ensure you install FP 2.2 for LCM XI 3.1, etc.
Hope this helps some of you.