Antec computer crashes and shuts down

I own an Antec computer, that supports 2 dell monitors. For the last 2 years since I have moved to PA from IL, my computer has been crashing. I can't play minecraft, or even be online, web browsing. We have had this computer since 2006 ish? I'm not sure if i should wipe it or just by a new one?

You should wipe it and replace the ram before you wipe it! Remove the dialup modem!

Take the CPU fan off the CPU carefully so you don't pull the CPU out of the socket and put new heatsink grease between the CPU and sink! Sparkplug antiseize from the autoparts store is fine!

Install all drivers and do all updates and that computer will run great!

Sounds like it is over-heating. Run it with the case open and make sure the fans are moving. Try re-installing the CPU cooler. (You are using an after-market cooler - right?)