I want to take a new office pc and move into my office. The new PC has Windows 7 and I am not concerned about keeping any data on that PC. On my office PC I am running XP SP3. Can I run the windows back up app and save my hard drive onto an external drive and then install it onto the new Windows 7? I need all of the data on my PC (Windows XP) but want to transfer it over to a new PC (Windows 7).