By default, Gmail Notifier (for Windows XP) is set to run for all users. I wanted to change this so that it’d be run only for myself and not for other users of this computer. The solution was finding the ‘gnotify’ entry in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run (actually, it wasn’t there by that name at least for me, but by a key value beginning with {0228e555…) and then moving it to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run, while logged in as myself.

I’m pretty sure this’ll break the uninstall as for this particular key, since it’s no longer where the installer thinks it is, but it’s a minor issue and should be easy enough to fix by removing the key from its new location manually.