It has been only a few days since I have upgraded my old PC to Windows 10 and it has started to show a strange error – WORKER INVALID. This is a blue screen of death (BSOD) error, so you cannot do anything about it – the screen just becomes blue all of a sudden and then the error is shown for only 4-5 seconds before the PC is rebooted. So far I have seen this error 5 times in last 7 days. What is causing this error and how we can fix it are the important questions are at hand. The BSOD screen itself shows a lot of information along with a QR code that you can scan using your smartphone and visit the Microsoft website for more details. You can also call Microsoft on helpline number (printed on the Windows 10 installation DVD) and explain everything to them.
But while you are waiting for Microsoft to pick up your phone, you can also do some investigation yourself. To find out which components of your PC (hardware or software) are responsible for this error, you can download and install WhoCrashed. It is available for free for the home users but for professional use you will have to pay for the license. When I ran it on my Windows 10 system, the error was shown linked to hal.sys.
It also suggests that it is some software driver bug and has nothing to do with the hardware. This brings some relief because now we have to find only an updated driver that does not have any problem with the new version of Windows 10. But what software driver should we update?
Basically, you have to update all of your chipset device drivers , for example, the graphics drivers, network drivers and the audio drivers. In my case, I was using an outdated version of NVidia graphics driver and after upgrading to the latest version downloaded from the NVidia website, the problem was resolved. I have not had any problem since then.
But if this does not resolve your problem, then perhaps you may have to roll back the Windows upgrade and go back to the previous version of the Windows that was working find on your PC. You can learn how you can roll back Windows 10 installation back to an earlier version of Windows.