When I try to run windows XP with parallels 4.0.3844 my mac pretty much starts to act like my sisters windows laptop when she forgets to run a virus scan. This is unbearable, I need to run windows XP for work and really don't feel like going out and buying an extra laptop. The crawl it slows my macbook pro to makes work imposable. I know that virtual box is out there, but my boss wants us to use parallels, my mac seems to be the only one effected out of the 3 at my office. I have 4 gigs of RAM and 2.4GHz of processing power, has anyone had this happen and fixed it?