Odd pagefiling since Enranchmnt

Ok, hers the deal, every time someone build a starbase, and i zoom in so that the LoD model diplay its mesh, my game freezes for baut 5 minutes, then starts pagefiling like mad, using up fucktons of virtual memory.

after the said 5-6 minutes, it will load up and the game will continue normaly... that is untill i find and zoom on difrent races starbase, and the same loading procedure repeats itself...

Now, i have reinstalled and what not, but the problem, that startted and is limited to only entranchment units continues.

Thats on my Table top PC, luky for me i can play normal from my lap top, but it is not as powerful and will slwo down in 5v5 games after some 1000 odd units and they fighters and tradeships and what not start roaming the fields.

Any clue of what might b the cause and possible fix?