[NotationUser]

Hi Mark.

It seems that I found the issue today!

For short, the problem is not Vista but Vista OEM installations.

I guess a clean Vista installation may not show up the problem I struggled with.

I use an Acer PC with pre-installed Vista 64 home premium OEM - which adds a lot of useless stuff I try to eliminate since I have that...

Accidentally I stumbled across a process called "pcmmediasharing" which annoyed me for long as it is also knocking on my firewall all the time.

When I terminated that process in task-manager prior to starting Composer the first time opening files worked!

To deactivate this process permanently I did the following:

1. run "msconfig" (simply type this in the Vista search in the start menu)
2. confirm security request
3. a system dialog opens
4. click tab "systemstart"
5. remove check at entry "pcmmediasharing".
6. confirm dialog (click OK button)
7. reboot Vista


I still don't know how this process is related to Notation Software but removing it seems to fix the issue!

Hope this did it and I do not find something else...