How long do custom built PCs usually last?

I've had my first custom PC for at least a year and a couple of months. It still works fine, just the startup is a teensy bit slower then usual. The thing that annoys me is the fan lights are blinking and making a clicking sound every couple of seconds. Sometimes it would do that for hours, and sometimes it would do that for a few minutes. I noticed that the graphics card handles Skyrim really good, but when I tried GTA IV it heated up within an hour. I want to still working on this internet job I just got but it would take a few months to earn a decent income. I'm worried that my only PC that I have would stop working by that time. I wouldn't have the money to build a new one.

 

This is an incredibly subjective question because it depends on how well it was built. You can't determine a computer by what it was built with but rather by how well it was build. Also if a custom built pc does have a problem quickly it is usually due to a small oversight like a loose wire. So short answer it depends, the only thing you could do is look up the quality of your parts and their estimated life span.

 

My last one serviced me for 7 proud years, had to rebuild because motherboard was going bad, only supported 4 gig ram and 1 slot went bad. Had to replace the HDD on it about 2 years back due to physical wear

 

about two months ago I cleaned it. Tried to wipe out the dust, but it usually gets hard to reach certain areas. That seems likely. So I could just clean out the dust every once in a while?

 

Pretty sure it's notthe hard drive clicking. The fans often somehow stop blinking and the clicking would stop when that happens. Usually though they click and blink most of time.