Your PC looks like it has the power, but with the Integrated Graphics, you may have trouble. Integrated Graphics are not recommended with Pro Tools. Also, there are many variables when setting up a Pro Tools system. A qualified external FW Hard drive is required connected via a fire wire card that has a Texas Instruments Chipset. You will also need a qualified M-Audio interface. There are USB and FW. If you go FW with a laptop, you should connect your FW interface to your onboard FW port on the laptop, if you have one, and the HD to the FW Card.
See what I wrote in this thread for some details:
http://duc.digidesign.com/showthread.php?t=274813
Not to scare you away, but - Pro Tools is not for the technically faint of heart. It has many variables that need to be worked out, and will require technical knowledge of computers and DAW software. I recommend reading over all the requirements and necessary components of Pro Tools on Avid's website.