I have read other threads about freezing but can't find anything related. I have been playing fine for about a month, but suddenly every time I start Civ IV it will just freeze and require rebooting after about 30 secs to 1 min. I have not done anything to my laptop before this started, no graphical changes, etc.

I have reinstalled 3 times to no avail (keeping my saved games)

It is irrelevant what I am doing in the game, it just freezes after so long, be it the main menu, loading a game, in game, even did it while I was trying to download the 1.52 patch.

I have this patch now but doesn't help at all.

Please help, I can't play this game anymore. Thanks

If anyone is having a similar problem with the game freezing, I tried the solution posted here http://forums.civfanatics.com/showthread.php?t=141029&highlight=radeon+9000

...it worked a treat and I can play the game with no problems again.