This user guide describes some of the possible causes that can cause a dual boot error. Then you can try to fix this problem. Symptom 1: Unable to load operating system error screen at startup. This error occurs when your computer’s BIOS does not support the capacity of the hard drive you are installing Windows XP to, or is not installed correctly. Hard drive partition problems can also be a serious cause.
Resolving an error while loading the operating system in Windows XP, Windows Vista and Windows 7.
What Exactly Prevents Your Computer’s Operating System From Loading Correctly? How To Solve The Problem With The Operating System Boot Error
When the computer is turned on and started, the BIOS and CMOS start up during system setup, check hard drives, and start the operating system. If you run into a hard disk problem during the process, the operating system won’t start and you won’t be able to open your desktop.
Solution 1. Use Bootrec.exe And Windows Bootable CD / DVD.
For this method, you need a Windows installation disc. Take care of this in advance.
Now start the computer from the Windows installation disc and follow these steps: Press any key when prompted on the computer -> Click the “Repair your computer” button -> Troubleshoot -> Command Prompt. In a new Command Prompt window, enter the following commands:
- bootrec / FixMbr. Press the Enter key.
- bootrec / FixBoot. Press the Enter key.
- bootrec / ScanOs. Click the Enter key…
- bootrec / RebuildBcd. Press the Enter key.
Wait for the process to complete and restart your computer without the installation disc.
Didn’t you help? Go to solution 2.
Solution 2: Uninstall, Recreate And Reinstall
To resolve an error while loading the operating system, you can: delete all partitions, then re-create the partitions and reinstall Windows.
This method of fixing Windows 10, 8 or 7 operating system boot error is sufficient and you should definitely try it.
If you haven’t decided yet, you can refer to the next paragraph.
Solution 3: Update BIOS
Your BIOS may be out of date and need to be updated. Try to do this by downloading and installing updates from the manufacturer’s official website.
If you don’t know who the manufacturer is when starting the system, you need to press the pause button. Find the manufacturer’s name in the messages and continue booting the system.