HELP - PC shuts down "due to Thermal Event"

The problem is that the PC completely shuts off after about 10 minutes of use... when I boot it back up, I get a message saying :-

Alert! Previous shutdown was due to Thermal Event

Read more: https://forum.flyawaysimulation.com/forum/topic/3004/help-pc-shuts-down-due-to-thermal-event/

after i switch the system the motherboard fan work but not in full speed & in the middle of it i could hear some sound like as if its touching any sides & also the fan that's attached to the cabinet isn't working but the fan tht's behind the SMPS runs in full speed.can anyone help in diagnosis what's the problem & how can i overcome it.
thank u

The link you posted said it all.
If your fans are making noise or just not working, replace them.
It's very easy to do, it's not as complex as building a machine.