PC won't boot after lastest Windows 10 update

Greetings VQT, what brand Mother Board OR what make and model of PC do you have and I'll look it up for you.

@domoore thank you that would be quite neighborly of you!

I have a Lenovo A520 All-In-One (AIO) circa 2013.

Greetings VQT, wow, I read through the maintenance manual, I'll attach a link for you, one for the pdf manual, and one for Lenovo's support page.  

Even to pull out the battery looks like a lot of work with this one, the manual says to use a function key to reset the BIOS, but what you need to know is how to reset it when it won't go to POST (the same problem I had).  I have read several people that simply unplug the Lenovo and let it sit for 30+ minutes and then try again.  I'm not sure if that will help.  I would suggest calling their (Lenovo's) technical support line on Monday if that doesn't work.  They should be able to walk you through a solution.  a LOT of people are having this happen to them.  I honestly wish I could be of more help to you, this is the most frustrating thing I've had happen after ANY software "update."  Microsoft knew about this problem three months ago, yet they haven't fixt anything, seriously, they should be footing the bill to have these PCs fixed.  Good Luck, seriously I hope you get it going, DM

https://support.lenovo.com/us/en/troubleshoot/LPT000542?firstpdt=LPT000422 

https://download.lenovo.com/consumer/desktop\_pub/ideacentre\_a520\_hmm-fru\_20130419.pdf

Greetings VQT, what brand Mother Board OR what make and model of PC do you have and I'll look it up for you.

@domoore thank you that would be quite neighborly of you!

I have a Lenovo A520 All-In-One (AIO) circa 2013.

Hi GavinCarroll

I am Vijay, an Independent Advisor. I am here to work with you on this problem.

A. Try to boot into safe mode

Power ON your computer and as Windows / manufacturer's Logo appears, Power OFF - Repeat 3 times

Now your computer will go into Advanced Recovery Environment

Advanced Options > Troubleshoot > Advanced Options > Startup Settings > Restart

Press 4 or F4 to enable Safe Mode (5 or F5 to enable Safe Mode with Networking)

Log in once Windows starts in safe mode

See whether you able to login. If yes, come out of this and start normally.

If you are not able to boot like above, You will need to boot through a Bootable USB drive. You will need to create this on another computer which is working - https://www.tenforums.com/tutorials/2376-create...

How to Boot from a USB Flash Drive in Windows 10 - https://www.tenforums.com/tutorials/21756-boot-...

B. Another option when you are in Advanced Options in previous step is to choose (Note - You won't lose any files in this step)

1. System Restore - This will restore your system to a point when things were working fine.

OR

2. Startup Repair - Startup Repair upgrade fixes all Windows errors and retains all files, applications and settings.

C. Penultimate option could be Reset this PC.

In Step A > Troubleshoot > Reset this PC - Keep my files and Remove everything. Choose this carefully as most likely you would like to keep your files.

All apps will be removed and windows will be reinstalled.

D. Last option could be a clean Install. This is the best method to perform a clean install of Windows 10. (If you want to rescue your files, there is a section Rescue Files when Windows Won't Start)

https://answers.microsoft.com/en-us/windows/for...

If you want a very lightweight guide - Start fresh with a clean installation of Windows 10

https://www.microsoft.com/en-us/software-downlo...

Disclaimer - This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

This reboot 3x to get into safe mode has to be the dumbest step backwards microsoft has ever done.   You have to be kidding me,  what idiot came up with this idea.

how do they expect you to boot your pc if it wonts start

After using Windows for 35 years I finally am encountering a bad Windows update (auto downloaded by MS on Thursday night while I was asleep) that have rendered my PC non bootable & given me a black screen.

I know you can boot using a recovery USB stick but alas I haven't made a that stick using my PC's image when it was still booting up.

So now am researching how to create one & hopely not have to lose all my files (even though I hve it backed up to the clouds already).

Dear VQT,

OK, I have not purchased a PC in 30 years, this was the first time that I updated ANY software and my PC build would NOT got to POST.  After I got over my initial PANIC, I decided to try and reset the BIOS on my motherboard.  After unplugging and removing ALL cables from the PC, I took the cover off, located the two PINS for BIOS RESET, removed the motherboard battery, and shorted out the two PINS and reset the BIOS.  Every motherboard is different, use your motherboard manual to see exactly how to do this.  Once I put my PC back together and plugged it back in, IT WORKED AGAIN.  SO, Microsoft is screwing with the BIOS somehow and it KILLS the motherboard.  Try this option, EVERYTHING WAS THE WAY IT WAS BEFORE THE UPDATE.  Also, my Motherboard was a NEW ASUS X570 PLUS running a RYZEN 7 with NO overclocking.  Thank Microsoft for sending out KILLER UPDATES.  Good Luck - DM

@domoore -wjat do you mena by j"shorted out the two PINS and reset the BIOS" ?

Do you mean resetting the BIOS password?

No Sir, actual PINS on the Motherboard.  Every Motherboard has these pins, however, they can be anywhere on the motherboard.  They are two pins (for a connector) that never go to anything.  If you don't have a JUMPER you can hold a flat screwdriver (gently) so that both are touching the screwdriver, this will cause a SHORT and RESET the BIOS.  Your BIOS will go back to all factory default settings, and undo whatever it is that the Windows Updated did.  If you have a laptop, it harder to get to because of the case.  Every brand of motherboard that I have ever used has these two pins (located right next to each other) OR a reset switch.  I've attached a photo of the pins on a MSI 470+ Motherboard, they are located next to the PCI E4 slot, but they can be anywhere on the board depending on the manufacturer.  Get a manual for the Motherboard, it should tell you exactly where these two pins are located.  Some motherboards have an actual reset switch.  Once you reset the BIOS your PC should start, I know mine did!

Good Luck, I hope this helps you out, DM

@domoore thanks for the clarification.  

One last question - since I don't know my way around the internals of a PC - where in your picture are these Pins?

Is it the 2 poles that say JBAT1?

Greetings VQT, what brand Mother Board OR what make and model of PC do you have and I'll look it up for you.

how do they expect you to boot your pc if it wonts start

After using Windows for 35 years I finally am encountering a bad Windows update (auto downloaded by MS on Thursday night while I was asleep) that have rendered my PC non bootable & given me a black screen.

I know you can boot using a recovery USB stick but alas I haven't made a that stick using my PC's image when it was still booting up.

So now am researching how to create one & hopely not have to lose all my files (even though I hve it backed up to the clouds already).

Dear VQT,

OK, I have not purchased a PC in 30 years, this was the first time that I updated ANY software and my PC build would NOT got to POST.  After I got over my initial PANIC, I decided to try and reset the BIOS on my motherboard.  After unplugging and removing ALL cables from the PC, I took the cover off, located the two PINS for BIOS RESET, removed the motherboard battery, and shorted out the two PINS and reset the BIOS.  Every motherboard is different, use your motherboard manual to see exactly how to do this.  Once I put my PC back together and plugged it back in, IT WORKED AGAIN.  SO, Microsoft is screwing with the BIOS somehow and it KILLS the motherboard.  Try this option, EVERYTHING WAS THE WAY IT WAS BEFORE THE UPDATE.  Also, my Motherboard was a NEW ASUS X570 PLUS running a RYZEN 7 with NO overclocking.  Thank Microsoft for sending out KILLER UPDATES.  Good Luck - DM

@domoore -wjat do you mena by j"shorted out the two PINS and reset the BIOS" ?

Do you mean resetting the BIOS password?

No Sir, actual PINS on the Motherboard.  Every Motherboard has these pins, however, they can be anywhere on the motherboard.  They are two pins (for a connector) that never go to anything.  If you don't have a JUMPER you can hold a flat screwdriver (gently) so that both are touching the screwdriver, this will cause a SHORT and RESET the BIOS.  Your BIOS will go back to all factory default settings, and undo whatever it is that the Windows Updated did.  If you have a laptop, it harder to get to because of the case.  Every brand of motherboard that I have ever used has these two pins (located right next to each other) OR a reset switch.  I've attached a photo of the pins on a MSI 470+ Motherboard, they are located next to the PCI E4 slot, but they can be anywhere on the board depending on the manufacturer.  Get a manual for the Motherboard, it should tell you exactly where these two pins are located.  Some motherboards have an actual reset switch.  Once you reset the BIOS your PC should start, I know mine did!

Good Luck, I hope this helps you out, DM

@domoore thanks for the clarification.  

One last question - since I don't know my way around the internals of a PC - where in your picture are these Pins?

Is it the 2 poles that say JBAT1?