When you last upgraded your computer ?

Maybe about 1,5 till 2 years. I think upgrading is important, because software technology also fast changing.

I upgrade my computer once, I put more RAM. Now that my HD upgrade that is full.

I've just upgraded my computers mother board and ram for the first time since I bought it about 6 years ago. It was breaking down a lot and desperately needed it, but unless your computer is performing badly there's no need to upgrade it just because technology has progressed. If it ain't broke don't fix it as they say.

I have been using my laptop DELL Lattitude c5x for 5 years and never upgrade or change any hardware. Still working very well. But always update latest version for Norton Anti-Virus. And for routine maintenance, once a week activate Disk Clean Up and Disk Defragmentation. Hope it can last for another 5 years.