Laptop Keeps Rebooting Randomly Without Warning

Hi

As above, my laptop keeps rebooting randomly without warning, and then takes a while to "get going" again, as though it's doing some kind of update.

System info as follows:

Operating System
Windows 10 Home (x64) Version 1709 (build 16299.125)
Install Language: English (United States)
System Locale: English (United Kingdom)
Installed: 04/12/2017 21:08:51
Servicing Branch: Current Branch (CB)


System Model
LENOVO 80EC Lenovo Z50-75
System Serial Number: PF0ID0XB
Chassis Serial Number: PF0ID0XB
Enclosure Type: Notebook

Processor a
2.10 gigahertz AMD FX-7500 Radeon R7, 10 Compute Cores 4C+6G
256 kilobyte primary memory cache
4096 kilobyte secondary memory cache
64-bit ready
Multi-core (4 total)
Not hyper-threaded
Main Circuit Board b
Board: LENOVO Lancer 5B3 SDK0J40709SDK0J40709 WIN
Serial Number: PF0ID0XB
Bus Clock: 100 megahertz
UEFI: LENOVO A4CN40WW (V 2.09) 08/24/2015
Drives
978.26 Gigabytes Usable Hard Drive Capacity
866.68 Gigabytes Hard Drive Free Space

PLDS DVD-RW DA8A6SH [Optical drive]

WDC WD10JPCX-24UE4T0 [Hard drive] (1000.20 GB) -- drive 0, s/n WD-WXP1EA5A3FEY, rev 01.01A01, SMART Status: Healthy
Memory Modules c,d
7100 Megabytes Usable Installed Memory

Slot 'DIMM 0' has 4096 MB (serial number 005337D8)
Slot '' is Empty
Slot 'DIMM 0' has 4096 MB (serial number 008337D6)
Slot '' is Empty

Hope this is sufficient info and hope you can help!

Thanks
Monkeycat

 

It could potentially be a few things like a plugged heat sink and overheating, or possibly an early indication of hardware failure such as the hard drive.

How long have you owned this laptop? Can you install and post the information supplied by HDSentinel?

http://www.majorgeeks.com/files/details/hard_disk_sentinel.html

It would be helpful to know how many hours are on the drive, and it's start/stop count.

 

I had the same problem after the first update to Windows 10. These are some steps that I went through to solve the problem by Googling. The last set of suggestions, I believe solved it in my computer.

Disable Fast Startup. I fixed this issue with these steps:

1. Go Control Panel
2. Power Options
3. Choose what the power buttons do
4. Change settings that are currently unavailable
5. Uncheck "Turn on fast startup (recommended)"
6. Save changes.

Also, go to advanced power settings -> Sleep -> Allow wake timers and disable it.

I suggest you to make change in the system settings and check it helps.

1. Click on Search bar.
2. Then type "System" without the quotes in the search bar and click on it
3. Click on Advanced System Settings.
4. Then click on Advanced tab.
5. Click on Settings under Startup and Recovery.
6. Uncheck mark on Automatically Restart and click on Ok.

 

Did this just happen after updating or ? Have you tried monitoring you pc and gpu temps. Does it give an errors or BSOD's

http://windowsreport.com/software-cpu-temperature/

 

Hi thanks for all the suggestions. As requested, I've installed the HD sentinel app and I've attached the file log. If you could let me know your thoughts about this, I can then look at the other suggestions etc if it's not a hard drive problem.

Cheers
MC

 

Don't know what your basic BIOS Set-up contains, but I would look in that for a couple of things. One, Boot from LAN should be disabled unless you have a specific reason to have it on. Also, Fast Boot perhaps can be disabled to see if that is contributing to the random reboots, if not you can turn on again.

The only other area that I can think of to look is the Tasks that are set up. Look at the Task Manager and go through the list. It may be set to start up in the wee hours for updates. This should be disabled as you can always go to the update section and update when you want to and are not going to use the computer for a while. So look through the Tasks and see if you can find any startup instructions to start at 3:00AM or such.

When I solve problems I usually write up a sheet and save it by (hopefully) a name I can relate to the problem and file it in a Computer Problems folder. Several times it has saved a lot of time to rediscover a solution.

Good Luck

 

HDD appears to be in good shape. Have you run the notebook solely on AC power with the battery removed to see if the issue persists?