Windows 10: Laptop unexpected shutdown

My laptop shuts down after about 20-25 mins when not connected. It started after a windows update. When connected to a power source, the laptop can run indefinitely. But once I disconnect from the power source, it shuts down an average of 23 mins after.


Much worse, if I attempt to turn it on without connecting it to a power source, the laptop stays on for only about 5 mins before turning off.


In both cases, I would be unable to turn on the laptop after the shutdown without first connecting it to a power source.


What good is a laptop that requires consistent power supply to be useful?


The CPU temp stays between 25-29 degrees. I've checked the vents as well. The event log doesn't give me anything concrete.


Any help?

:)

 

Unexpected Shutdown

Hi

Please see response to your questions below

• Did you make any changes on the computer prior to this issue?
  

No changes other than about a month ago reinstalling W10.

• What troubleshooting steps have you done so far?

Other than checking updates have successfully installed, none as not sure approach to take.

• What was the exact error code/message you have received?

No error code or message received. On the first occasion I was looking at outlook and without any warning the PC shutdown. It was almost as if it was a desktop (it is a laptop) and the power stopped. The laptop was plugged into the mains and in addition
the battery had a full a full charge.

On restarting the laptop no error message came up and I only noted a small difference in boot up, that for a short period a blue screen was displayed (not normally seen on boot up) and then the start screen appeared for me to log in.

As mentioned previously the only reference to this is from the log which in the summary states that there was an unexpected shutdown.

 

PC is Suffering Unexpected Shutdowns

Most important detail to me would be whether these shutdowns are sudden, in which case it's likely a short or PSU issue (capacitor aging maybe?) or graceful windows style shutdowns, which suggests software interference.

It could also be overheating components if it's a sudden shutdown. What are your thermals like?

 

unexpected shutdown

Pavan N

the shutdown has only happened once I will take steps you suggested if it happens again thanks for your help