Question: The game seems to be running in Windows 7 64-bit Ultimate but every time I press a key on the keyboard the game flashes and lags with short freezes and hiccups. How can I fix this?
Answer: The most common reason for the game flashing and pausing briefly every time a key is pressed is a conflict between the game and the Windows Event Log.
To disable the Windows Error Log service, click on the Start orb in the lower left of your screen and type MSCONFIG into the search bar. Open the utility, select 'Services' and then untick the 'Windows Event Log' entry. After clicking 'OK' you will be prompted to reboot so the changes can take effect. After a reboot please try the game again.