New Win7 PC somehow gets old Dial-Up Internet entries from old WinXP P

Somehow my brother's new Win7 PC ended up with old Dial Up Modem connections defintions on it. If one went into the Internet Options Connections tab, there were two entries. One was for a Broadband Modem and was for the real old telephone line (e.g. 56k modem) dial-up. I removed these. But the question remains as to how they got there?

The only thing that I can think of is that it happened when he put the HDD from his old WinXP PC into a caddy and attached (via USB) to the new PC to get documents, emails, photos etc. off there. I'm guessing that Win7 somehow detected these entries on the old HDD and somehow replicated them.

Now, I've often seen it mentioned that what he did is an often suggested way to transfer files. But is there a fundamental issue with it, as one is attaching another HDD (with an Active Primary Partition)? And does this somehow cause the host OS to get confused?

Or is there some other explanation?

Thanks for the reply. "Many people attach drives this way and do not have that problem." That's exactly what I thought.

However, when the caddy with the old drive was attached, Win7 started churning away (indexing?) and pretty much killed the machine for a while (and given it's a pretty powerful machine - e.g. i7, SSD etc., was all the more surprising).

Given that the old Dial Up Modem connections definitions ended up on the new W7 system (and I still suspect that it was somehow due to attaching the old WinXP disk as I just can't see how else it could have happened), it makes me wonder what else might have somehow got taken across.

It wouldn't have been possible to run anything like File and Settings Transfer Wizard as the old XP machine was kaput and could not be booted (probably due to knackered mobo). Hence the need to physically attach the disk to another machine to get the stuff off it.

I must say that some time ago, I booted an XP machine with second hard disk inside which also had an XP install on an active primary partition and Windows definitely got confused then and corrupted the XP install on the main HDD (easily recovered from by restoring an image back-up).