Here's my situation: I have the drive from my old desktop running WinXP, with a password. It's in an external enclosure, with a USB connection. I'm going to borrow a laptop running Win7 and connect my drive... am I likely to encounter any difficulty accessing my files? Will XP boot from the external, or will the laptop treat it as just a drive -- and in that case will I simply be prompted for my XP user password to view my old files? Thanks!