Hi Rhys,
Thank you for your post and giving us an opportunity to assist you.
I see that you get Error 126 on starting the computer.
You can try these methods to check if the issue gets resolved.
Method 1: Restart the Windows Modules Installer service.
a)Press "Windows key + R", type "services.msc" and press Enter.
b)Look for the "Windows Modules Installer" service and Stop it. Then Start the service.
c)Restart the computer and check if the issue get resolved.
**Method 2:**Run a system file checker scan and check if that helps.
Refer to the following steps to run SFC scan.
a)Move the mouse pointer to bottom left of the screen where you see preview of start menu and Right-click to bring up a list of Windows settings.
b)Click on ‘Command Prompt (Admin) to bring up elevated command prompt. Note: Click ‘Yes’ if it prompts for permission.
c)In the command prompt type in the following command: ‘sfc /scannow’.
If a Windows Resource Protection (WRP) file is missing or is corrupted, Windows may not behave as expected. For example, some Windows functions may not work, or Windows may crash. The System File Checker tool (SFC.exe) scans for missing or corrupted system files and repairs them.
Please get back to us with the results of these methods. Feel free to use the forum for any other Windows questions you may have.