So it would seem my plugins.txt cannot be written to whatever that means... I have it installed in Users > Me > steam > steamapps > common > skyrim.... Nexus mod manager cant activate most mods and boss won't work at all they both have a critical error which is.. " plugins . txt cannot be written to" I looked at the folder it has full permissions. I do not think UAC is any problem here.
So if anyone understands this and can help or point me in the right direction that would be great.
I completely reinstalled skyrim from one hard drive to another on my computer once so maybe that is it??