piranha,
Unfortunately I don't think drragostea's suggestion will actually fix the problem in your case.
You have three account in play here, the Administrator account, an account for Michel that has administrator rights, and a user (limited) acount for Amis.
In an earlier post you said
In my administrator profiles, I only have an "hostperm.1" file of 957 ko....
In my limited rights profiles, I only have "permissions.sqlite" file (0 ko)
The first thing you need to do is to close any open browsers, and also make sure SpybotSD is also closed
Do
NOT reopen Spybot until the steps below have been done.
Next delete the "permissions.sqlite file in the limited account.
Now log on in to the limited account (Amis), and start Firefox.
Goto Tools/Options then open the Privacy Tab. In the cookie area click on the exceptions button, then add a site. It's not important what that site is, so for example you could use
www.google.com and give it "allow" status.
Click on close, OK, then exit Firefox. This will have created a Hostperm.1 file for the user (limited) account and importantly will also have primed it.
Now log off of the restricted account and log onto the Michel account which has admin rights.
Now start Spybot. Go to the immunise screen and first undo all immunisations. This may take some time to complete as removal of immunisations from Firefox is fairly slow - be patient.
Once the undo has completed, re-immunise. This should be somewhat faster.
Hopefully this will fix the problems.
I suspect the number 20 that appears through the immunisation entries is new entries that had not yet been immunised when the screen shots were taken.