Former user wrote on 9/3/2015, 10:42 AM
If this is a new thing then you can try cleaning out the computer of all dust (using a blower).

The power supply could be failing or right on edge.

Make sure computer can get air in and out.
musicvid10 wrote on 9/3/2015, 10:57 AM
Get ALL of the dust out of your CPU fan and fins.

CJB wrote on 9/3/2015, 11:05 AM
Actually a vacuum is much better than a blower. Blower can jam bits of sticky dust into card sockets etc. Make sure to ground properly and clean vents/screens as well. Airflow is king! It is summer in northern hemisphere and a few degrees hotter in ambient temps can cause marginally cooled computers to shut down. In a simplistic fashion you can think of cooling systems in a at their peak provide a constant change in temperature. So if it gets hotter in the room you are going to have hotter cpu temps.
musicvid10 wrote on 9/3/2015, 11:53 AM
A vacuum will create static transients in the megavolt range if used in a dry, ungrounded environment. Proper tables for static grounding are far different than attaching a ground wire to the case.

Every time you use a high velocity vacuum or blower inside your computer, you run the risk of zapping a cpu or northbridge. Not unheard of, actually.

We had a previous discussion about this, with a variety of opinions shared, here:

diverG wrote on 9/3/2015, 2:27 PM
Can you monitor the temperature rise whilst your rendering and see how it compares with normal running. Maybe you could under-clock the CPU and lower the temperature rise that way. Just use the under clock setting whilst you are rendering. For day to day use you will not notice the slower running.

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TheHappyFriar wrote on 9/3/2015, 4:05 PM
I've used my air compressor turned down to blow dust out. Maybe have done it a couple times in 7 years.
Carlos Werner wrote on 9/3/2015, 4:33 PM
Also check if the thermal paste between the CPU and the heatsink is ok.
astar wrote on 9/3/2015, 5:03 PM
I love how the PC overheats and shutdown, and its windows 10 that's to blame. lol
VMP wrote on 9/3/2015, 5:12 PM
+1 after cleaning, check the thermal paste between the CPU and heatsink, remove and apply again if needed.