Webcam stopped working for one user, still works for another user

Question

I'm using 2 userprofiles on my laptop.
For 1 user, webcam software works as expected.
For 2nd user webcam stopped working.
For this user:
- Autostart Webcamsoftware doesn't work (traybar).
- Manual start doesn't work either.
- I can see that for each attemt, conhost.exe is started but no traybar.
- In systray i see the icon appearing but after some secs, it disappears.
- In syslogs, following error is shown:
Naam van toepassing met fout: traybar.exe, versie: 1.5.4002.79, tijdstempel: 0x46e9fe5c
Naam van module met fout: traybar.exe, versie: 1.5.4002.79, tijdstempel: 0x46e9fe5c
Uitzonderingscode: 0xc0000005
Foutoffset: 0x00001410
Id van proces met fout: 0x16f8
Starttijd van toepassing met fout: 0x01ccecdf12fc5566
Pad naar toepassing met fout: C:\Program Files (x86)\Camera Assistant Software for Toshiba(2.0M)\traybar.exe
Pad naar module met fout: C:\Program Files (x86)\Camera Assistant Software for Toshiba(2.0M)\traybar.exe
Rapport-id: 5a545dcd-58d2-11e1-9c2d-463500000031

Answer 1

I use my laptop for both private and office. Therefore i created a userprofile for home and another for the office.
Both userprofiles have different settings/desktops/etc.
Meanwhile i did the following:
- boot and logon with primary profile (working webcamsoft)
- uninstalled the program
- used CCClean to cleanup registry (and other stuff)
- reboot and logon with secondary userprofile
- used CCClean to cleanup registry (and other stuff)
- reboot and logon again with primary userprofile
- install the webcam software
- reboot and logon with primary userprofile
- test webcamsoft, it works
- reboot and logon with secondary userprofile
- webcam still doesn't work
any suggestions???