I remember that the system that came pre installed Windows Vista Business OEM, because after a power outage caused at the time was installed Windows XP SP3,on the side of the CPU that the marked label Windows Vista Starter (OEM) LATAM.
But the current system is Windows 7 Ultimate ,which I can not determine whether the system is Genuine or not.
Another thing I notice is that the machine is that information system has 2GB of Ram, but to see the properties computer only 1GB of RAM with this system that must be installed by someone.
It is not possible to check for updates in windows update
The windows can not update important files and services while the system is using.Salves open files, reboot the computer and try to look for new updates.