Re: problem with software center
I'm rather wary about hacking apart Unity and its components. Last time I tried that I ended up with an un-bootable install. Persoanlly I would just unhide the hidden startup programs and disable whatever you don't use. You can find instructions for that somewhere on these forums, but I can't remember where. A search for 'hidden startup' should find it.
In regards to your problem, we need more information. Reproduce the error and when the error report window pops up, click the button labeled "Mostrar detalles" and copy the message in the next window and paste it here.
MSI FM2-A75MA-E35 Motherboard - AMD A4-6300 Richland 3.7GHz (Radeon HD 8370D) - G.SKILL Ripjaws X Series 8GB - Iomega KVM - MS Digital Media Pro Keyboard
The cure to dependency hell: apt-get install apt-file - apt-file search file-from-error