I've been playing this game for a while now with not many issues occurring, it was working fine a few days ago but when I tried to play it again it said "sorry forged alliance forever couldn't complete the upgrade" followed by this log:
Update started at 2014-11-21 20:54:43
Using game path: C:\Program Files (x86)\Steam\steamapps\common\supreme commander forged alliance
Using appdata: C:\ProgramData\FAForever
Connected to update server at 2014-11-21 20:54:43
EXCEPTION: WindowsError((5, 'Access is denied'))
Disconnected from server at 2014-11-21 20:54:43
any assistance on this matter would be greatly appreciated thank you.