Hi !!!

I booted my ubuntu normally and I needed to install a package so, I opened Sistem -> administrator and suprise !!! Synaptics was gone !!!

So I left-clicked over the "system" section in my panel and selected "edit-menus". Under the "Administration" section there was synaptics unchecked, so I checked it but it unchecked it by itself in less than a second. I noticed that the options that "uncheck" themselves were in Italic font.

How can I solve this ??

Thanks in advance.

I've solved it !!!

It had to do with adding the user to the corresponding group.

WARNING. Any further change of the following file may corrupt your system.

1.- let's backup the /etc/group file

2.- Open the file with your favorite text editor

3.- Search in the file the line that starts with "admin". It sould look something like this:

4.- and add your current username at the end of the line. My username is "jazzbach" so, it should look something like this:

5.- Save the file and restart your computer