Since it's a desktop I can turn the power off at the switchbar so Windows doesn't get a chance to shutdown nicely and that error message might appear. This is not broken at all.
If your PC locks up, then this message might occur BUT you say you have to use the power switch. I'm running into folk that didn't know to PRESS AND HOLD the power on/off button for about 4 to 10 seconds and a good PC will power down. Then wait a second and we can power up.
Now about the hangs. I'd start with a deep cleaning. No, it may not be heat where heat is measured. PCs have lots of chips without temp sensors so go ahead and clean the insides (see YouTubes on how) and then leave the cover off. Power up and be sure all the fans work like new. Use a flashlight if too dim to see.
McAfee? Left that old horse behind years ago. Too many problems.
I am having system hang issue on HP Z230 & Z240 Workstations. Windows Application logs shows "The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly." with Event ID 41, Task Category 63, and all BugCheckCode = 0x0. I captured HW tool logs and it shows that CPU utilization is not high and temperature is also in specified range. I ran HP diagnostics extensive tests to check Hardware issues (
1. Windows extended RAM test, as installed to disk
2. MemTest86 on RAM, run from external CDROM
3. HP PC Hardware Diagnostics UEFI, as installed to disk
4. HP PC Hardware Diagnostics UEFI 6.3 from external USB drive ), all passed.
When System hang happens, it looks like hard hang - interfaces (Keyboard, mouse and display) are not responding. Only way to recover from this hang is to reboot the system from the power switch. I am trying to find out what can cause this kind of hang and how can I verify it as well ? So could you please help me to resolve this issue ? What tools can help me to identify the root cause ? or what experiment ?
I am using windows 7 on my all systems, all has McAfee Antivirus.