Hmmm ...an unusual problem which I've not seen myself to date anyway. I'm not a Ubuntu expert, just a bottom feeder in fact, but I suggest that it will be helpful to know which version you have installed, and whether it's allowed to update from time to time when the computer is online.
It may also be helpful to know whether Ubuntu is the only operating system on your laptop (make and model could also be helpful here), or if there is another OS (Windows?) installed with the option of selecting Ubuntu or the other one at startup.
regards,
FoR