Two things to consider:
1: How much free RAM do you have when you start the game? (CachemanXP is a freebie tool that can tell you that information.) C3C creates a rather large temp file (I forget the name of it, but it will show up in Task Manager), but I don't know the minimum size needed for that file.
2: You may want to uninstall/reinstall the game.
PC Cleaning
If you go the uninstall/reinstall, I would suggest that you take some time and do some housecleaning for malware. My thinking is that if the game did not install properly, it could be to a very fragmented hard drive. So let's defrag the hard drive. But, it doesn't make sense to organize garbage, so let's take some time to get rid of known garbage (spyware, adware, tracking cookies, etc). Once the garbage is gone, there will be less defragmenting to do. And then, when the game installs, it will be in one big chunk on the hard drive, which is good.
First, uninstall the game. Then download SpyBot Search and Destroy (freeware), Spywareblaster (freeware), Adaware (free for home use), WinASO (unlimited trialware), in addition to CachemanXP. Run SpyBot (about 20 minutes or so), Spywareblaster (5 minutes) and Adaware (30 minutes on Smart Scan, over an hour on Full Scan). These programs will notify you if you have any spyware or adware installed on your system. Remove that stuff.
(CachemanXP can run at start up. It displays an icon down by the date/time area that shows how much RAM you have available to use. It does not help with spyware.)
Once you've gotten all the known spy junk off your system, run WinASO to clean up your registry. It will fix 10 problems at a time, but you can run it as many times as you need to.
Then I would defrag the harddrive. That could take a while. How long depends on the last time it was defragged.
Once the hard drive is all nice and organized, I would update Windows and get all the latest patches and stuff.
Then I would reinstall C3C.
At work, I do most of these steps every Monday morning (except the C3C stuff

). At home, I try to do it once a month.