Hi,
I´ve seen that the game speed and the mouse pointer are big issues in this forum. I´ve had and partially I still have that problem so I´ve read every thread and post there is on the matter. I´ve done everything that has been said to speed uup the game: turn off UAC, changements in game configurator,turn off antivirus, defragmentation, changes in the in-game options menu etc... That helped quite a lot but I´ve tried a couple of others things to speed it up even more. These two steps are especially recommended for those of you whose computers are not very powerful or new.
1.- Configure your windows system to give you "the best performance". Your windows graphics will look like hell but the game runs much faster.
http://www.vistax64.com/tutorials/75417-visual-effects-options.html
2.- Get a USB-key and use the windows function "readyboost" for the computer to use it as storage capacity or extra RAM memory.
sorry the link is in Swedish but it´s a step by step process with images,you´ll figure it out)
http://www.mydigitallife.info/2010/02/07/how-to-enable-and-use-readyboost-in-windows-7-and-vista/sv/
Good luck