My cursor just freezes, and the PC just stops working altogether

From time to time, when I leave my computer for a while, and when I get back, the cursor is just stuck. When I move the mouse nothing happens. Any keyboard combo I try just doesn't work. It just froze. This happens every day. I can work on my computer for an hour or two, but then it stops. Only thing I can do is press the power button for > 5 seconds.

I was looking in my Event Viewer - System but I can't make much of it:


The server {B91D5831-B1BD-4608-8198-D72E155020F7} did not register with DCOM within the required timeout.


The Update Orchestrator Service service hung on starting.


The Downloaded Maps Manager service hung on starting.


Unable to start a DCOM Server: Microsoft.Windows.Cortana_1.13.0.18362_neutral_neutral_cw5n1h2txyewy!CortanaUI.AppXynb3eakad12451rv0 0qxextfnce9sxb8.mca as Unavailable/Unavailable. The error:
"2147942667"
Happened while starting this command:
"C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe" -ServerName:CortanaUI.AppXa50dqqa5gqv4a428c9y1jjw7m3btvepj.mca


Any ideas?

Check in Windows Update if there any updates of system

Please try a memory diagnostic test. Failing RAM is a common cause of these system freezes.

Diagnostic Test

 RAM TEST

Run MemTest86+ to analyse your RAM. MemTest86+ - Test RAM - Windows 10 Forums

   Note

MemTest86+ needs to be run for at least 8 complete passes for conclusive results. Set it running before you go to bed and leave it overnight. We're looking for zero errors here. Even a single error will indicate RAM failure.

Make a photo of the result and post it.

Addition:
If errors show up you can stop the test, remove all sticks but 1 and test this single stick in each slot for 8 passes or until errors show, switch sticks and repeat.

Hello @philc43,

The memory test ran for 58h37m28s.
Pass: 9
Errors: 0

Is there anything else that may cause these system freezes?

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MrPepka said:

Check in Windows Update if there any updates of system

W10 is up to date.

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I just noticed something:
Windows 10 is not supported on this product.
Source:
https://www.dell.com/support/home/en...-t3500/drivers

Could this be problematic?

Yes, the incompatibility with Win10 may be a problem. Sometimes you can be lucky and it will work but I suspect the system BIOS may not be compatible. If there is BIOS update to something released after 2015 you might benefit from this.

Unfortunately not. Latest BIOS is 2013 :-(

Anyway, thank you very much for your help!