I am using Ubuntu 12.04.5 LTS Precise Pangolin. The update manager creates a window telling me to update to Ubuntu 14.04.5 LTS Trusty Tahr. I'm in a dilemma: updating to Trusty Tahr or not.

My computer is: Dell OptiPlex GX270 SFF (Small-Form-Factor) Europe.

System Specifications: 

Processor: Intel Pentium 4 2.40 GHz

RAM: 1024 MB

Hard Disk: Western Digital 60 GB

Operating Systems:Windows 7 Starter 32-bit + Ubuntu 12.04.5 LTS (Dual Boot, GRUB as boot manager)

Partitioning: Windows(/dev/sda2 - NTFS): 42,62 GB | Ubuntu(/dev/sda5 - ext4): 12,70 GB(7,14 GB used, 5,56 GB free)