[jeffgrant]

Also, try leaving it running for a day or two without shutting it off or putting it to sleep.

There are a few "behind the scenes" admin tasks that are run every so often, usually at off times, and if they haven't run in a while, they can fire up while you're using it, which will slow things down.

Also, how much disk space do you have free? Try to have at least 10GB free, and I'd recommend investing in a good disk defragmentor and run it every few months.