How to Fix PC won’t post after Windows Update [Steps]

What is ‘PC won’t POST after Windows Update’ issue in Windows 10?

If you are facing ‘PC won’t post after Windows Update’ issue and you are unable to boot into your Windows 10 computer, then you are in right place for the solution. Here, you will be guided with easy steps/methods to resolve the issue. Let’s starts the discussion.

‘Power-on-self-test (POST) in PCs’: POST stands for Power-on-self-test in digital electronic device Personal Computers term. POST is process performed by firmware or software routines immediately after a computer or digital electronic device is powered ON. The rustles of POST may be displayed on panel that is part of device, output to external device, or stored for future retrieval by diagnostic tool.

Since, self-test might detect that system’s usual human-readable display is non-functional, an indicator lamp or speaker may be provided to show error codes sequences of flashes or beeps. The principal duties of main BIOS during POST in Personal Computers are to verify CPU registers, verify integrity of BIOS code itself, initialize BIOS, pass control to other specialized extensions BIOS, initialize chipset, and so on.

However, several Windows users reported that they faced ‘PC won’t post after Windows Update’ issue and explained they were unable to see Windows desktop means PC won’t POST. Users reported that this issue is usually started occurring after Windows Update or when they attempt to start/restart their computer after Windows update, their PC won’t POST at all. This issue indicates that there could be some issue with some sets of hardware especially new hardware conflicting with older hardware, failing or bad hardware device, electrical shorts or incompatibilities. Let’s go for the solution.

Table of Contents

How to fix PC won’t post after Windows Update?

Method 1: Remove recently attached hardware from computer


This issue can be occurred due to recently or new hardware device attached into your Windows 10 computer. It might possible that the recently or new hardware attached is not properly connected or there is some issue with hardware itself that’s your PC is not POSTing anymore and result in you are unable to boot your computer. In such case, you can try to fix the issue by removing the problematic hardware safely from computer. Or, you can change the Windows Settings to work with new hardware device if the device is compatible with your computer.

Method 2: Remove USB/DVD/DVD

This issue can be occurred due to the connected USB flash drives, DVD/CDs to computer. It might possible there is some issue with USB/DVD/CD connection in your device that’s why you are experiencing ‘PC won’t post after Windows Update’ issue. You can disconnect all of them and then restart your computer, and check if your PC can pass POST and boot into your computer.

Method 3: Disconnect external devices

One possible way to fix the issue is to start your computer without any peripheral devices or external devices. You can remove all external devices or peripheral devices from your Windows computer and except the power cable for power, and monitor for the display, and then restart your computer and check if it works for you. Once resolved, you can plug/connect each external devices/peripheral devices one-by-one in order to check which one is problematic, and remove the problematic one permanently.

Method 4: Identify the Beep Codes

If you get a series of Beeps sound from your computer, you should check your PC’s motherboard or computer documentation for the information on beep codes, and then you can identify which components goes bad or failing. After that, reconnect each device at a time to ensure which device is causing issue in order to fix the issue.

Method 5: Check power cables

You should make sure power cables are connected to your computer properly and securely. ‘PC won’t post after Windows Update’ issue can be occurred if the computer doesn’t have enough power or the power is interrupted. You can disconnect and then reconnect power cable in order to fix the issue.

Method 6: Check all Fans

Another possible reason behind this issue can be the computer’s Fans if it is not working properly in your computer. If a fan especially CPU’s heat sink fan fails, you can face ‘PC won’t post after Windows Update’ issue. You can contact computer service center to fix computer’s fan issue.

Method 7: Disconnect All Expansions Cards

You can also try to fix the issue by disconnecting the riser board and all expressions cards from computer. These cards are not important to system operation, and check if it works for you.

Method 8: Disconnect and reconnect RAM & CPU

If the issue is still persist, then you can fix the issue by disconnecting CPU & RAM from motherboard and then reconnect it into computer. Check reconnecting RAM & CPU method resolve the issue.

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I am sure this post helped you on How to fix PC won’t post after Windows Update with several easy steps/methods. You can read & follow our instructions to do so. That’s all. For any suggestions or queries, please write on comment box below.

Samir Prakash Author