I can not install. GalCiv2.

After downloading from impulse the program freezes my mouse and keyboard while "extracting files please wait..."

I then have to kill power to box to recover.

My OS is vista 64. Video card nvidia gtx 280(latest drivers).

i have changed video setting, changed page file size(made larger), deleted and redownloaded the game, but I can not get past this problem.

It is very annoying having wasted about 12 hours of my time now.

Only other oddity is both time I have downloaded it tells me on first attempt "invalid download" and asks if i want to Retry. I do and validation works second time but then locks up computer when extracting files.

HELP Please