I am in the market to buy a portable pc. Instead of buying yet another bulky laptop, I though it might be nice to have a Surface. Ultimately, I would like to run Photoshop and Quickbooks on it. I am curious, however.... Would it be possible to install programs to an external hard drive and actually run them from that drive, effectively not installing anything (or very little) to the Surface itself? For all I know, this may not even be possible on a PC. I have never tried. Thanks.