This morning I started up my pc and there was no new activity created. However, on my laptop one was created.
For the record: my Virtual Desktop settings are identical on PC and laptop : Number of Desktops 1, Number of Rows 1 and Different widgets for each desktop unchecked. On this one desktop I have 4 activities. I use an activity bar in the panel. Any New Activity is immediately visible.
I compared the .kde4 folder structure on pc and laptop found them quite different and confusing. So I logged out of the pc, logged in via failsafe and moved the .kde4 folder to .kde4.old. I logged in with default to get a fresh .kde4. The default setup has 4 activities, 3 of which are inactive.
The initial folder structure is:
.kde4
./Autostart
./share
./share/apps
./share/config
./share/config/kresources
./share/config/kresources/contact
My old structure on the PC was.
.kde4.old
./Autostart
./share
./share/apps
./share/autostart/ ./share/config/
./share/kde4/./share/autostart:
krunner.desktop
plasma-desktop.desktop
plasma-netbook.desktop
./share/config
./share/config/kresources
./share/config/kresources/calendar
./share/config/kresources/contact
./share/config/session
./share/kde4
./share/kde4/servicesThe laptop .kde4 folder was even a bigger mess. So I removed the none matching folders. I logged out from the PC. Logged in again with failsafe and moved .kde4 to .kde4.default and moved the stripped .kde4.old back to .ke4. I logged in with default and got a
New Activity

.
Well, so be it. I got rid of it and decided to be stubborn and delete the startupconfig and starupconfigfiles again.
Shutdowned, switched power completely off, switch power on and booted. No new activity.
p.s. fif command was not found.
The file kglobalshortcutsrc holds the following data
[kactivitymanagerd]
_k_friendly_name=KDE Activity Manager
switch-to-activity-0e23c68f-2a72-4bea-a53c-413da63d806a=none,none,Switch to activity "vwin7"
switch-to-activity-1b388d3e-5258-4d8a-86fe-9b22fe240853=none,none,Switch to activity "New Activity"
switch-to-activity-411f42ac-4a18-4ef7-a913-b3f59c25f47c=none,none,Switch to activity "New Activity"
switch-to-activity-4e588fb3-17f7-423b-a602-fc5195f87ff0=none,none,Switch to activity "New Activity"
switch-to-activity-63769d5d-49fd-43fd-8dbc-5cc7b086ac85=none,none,Switch to activity "New Activity"
switch-to-activity-7254d896-fe62-4fc0-9d3f-25164d8bf143=none,none,Switch to activity "New Activity"
switch-to-activity-7a5020c6-0512-444a-8ac6-0606c2ca3221=none,none,Switch to activity "New Activity"
switch-to-activity-a1f16efc-8f65-4bfb-b6dd-3c221237344a=none,none,Switch to activity "New Activity"
switch-to-activity-cb498793-2cf6-4746-93b7-333d3460094d=none,none,Switch to activity "news"
switch-to-activity-db63f70f-2fa1-473f-bdfb-2a0bdee5ba0d=none,none,Switch to activity "main"
switch-to-activity-e9927aac-499c-43d7-87f3-75d3ad4c0c94=none,none,Switch to activity "widgets"
I stripped the excess lines
Mellon