Well, my data HD failed two weeks ago, and a replacement is on the way.  I'm also thinking I'd like to replace my boot drive with the SSD I bought some time ago.  At some pont though, I expect to have the SSD drive and my current drive installed at the same time.  What I'm wondering is, assuming I can authenticate the new install on the SSD drive, will the current boot partition remain authentic?  Is it possible to have two authentic installs of Win7 on two different drives within the same computer?