Hello all,
For those of you experiencing issues with typing in Windows 7, I would advise you to check your computer manufacturer's support web site for updated drivers for your laptop touchpad or for your keyboard and mouse.
If you are unable to locate any, I would then look for a function key or button on your laptop that will temporarily disable the touchpad while you are typing.
If you are still experiencing issues with this after trying both of those troubleshooting methods, I would advise you to start a new thread at this location:
http://answers.microsoft.com/en-us/windows/forum/performance