Adding the same computer to WHS twice

With my corporate laptop dying on me again last week, I needed a reimage. This was then duly performed by IT Support at work. The first thing on my to do list when I booted it at home was to add it to my WHS for backup purposes.

However this didn’t quite work as expected. At the end of the Connector install, I got an error stating I already had 10 computers connected to my WHS and that to add this one, I’d need to remove one. Unfortunately removing a computer from WHS also removes ALL previous backup images of said computer as well.

Now I don’t have 10 computers in the house (more like 5) however the other computers are old images of reimaged computers (my vista x64 image of my desktop now running Windows 7 for example). The problem is I *do* was to keep these at least short to mid term just in case there’s files/resources that I’ve not yet needed or restored from them.

And anyways, I was adding the SAME machine twice, with the same computer name, the same licence key etc. Why was it looking to add it as a totally new machine?

Well the answer and solution is relatively simple thankfully. Scouring the forums, there was a general annoyance at this ‘feature’ as it was causing a lot of inconvenience to everyone, especially to people who like me, prefers to reimage their machine periodically to ensure optimal performance.

Luckily the fix is simply a registry tweak: -

From the looks of it, the first time the WHS Connector software is attempted to be installed onto a desktop it creates a registry key in

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Home Server

Within this newly created key it assigns a GUID to this machine (in the “value” called GUID ironically enough).

On the WHS, each computer is tracked by its GUID. These are again listed and managed by a registry key: -

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Home Server\Transport\clients

Within this section there is a number of registry key entries, one for each of the computers managed by the WHS. If you then look at each of the keys, you’ll see the values against it show full details of each of your computers (the computer name, the Model etc).

So the fix is simple. Locate the entry under ‘Clients’ that represents the computer you’ve recently reimaged. Head back onto the computer you’re trying to add and replace the GUID registry value with this value from the WHS and reinstall the WHS Connector software.

This will then simply merge this new computer back into the existing computer account it has on the WHS as opposed to attempting to create a new one.