Quite a number of Windows PC users experience this. When you turn on your PC and find out that there’s an error message preventing it from booting, the bootloader on your system partition is defective. Mostly due to boot sector problems whereby boot sector file(s) is corrupted, damaged or has some inherent files missing. Let’s delve into the full time troubleshooting steps that deal with these terms:
- Master Boot Record:
- Boot Sector
Some Typical Error messages you will find:
- NT Bootloader missing
- Invalid System Disk
- No bootable medium found!
- Boot Failure
- Hard disk Error
Solutions To Windows PC Bootloader Problems
The Basics of Recovery
When a computer is booted, the BIOS (Basic Input/ Output System) loads the master boot code into the RAM thereafter allowing the boot code to execute at will by skimming the partition table to discover the active partition. Once found, it loads the boot sector into the RAM to continue initiating the booting process. If these fail, and you see any error message, you might want to try out one of these steps:
- Boot Your Windows From Recovery Partition: This is very helpful to be done as a first step towards formatting your PC to an earlier state. You can run this only if you have an earlier configured recovery partition on your hard disk. You will often see a prompt message directing you on what key to press to commence repair or recovery. Then you follow the succeeding directives to restore your PC.
- Boot Your Windows from an Installation media: Even when you do not have a recovery partition in your PC, you can still initiate system repair by booting your Windows from a Windows Installation Disk. Once you boot your PC through the Windows Installation Disc, you will see a link Repair your computer bottom of the installation screen, click on it. On the next page, you click on the Troubleshoot option.
It is noteworthy that the screens might appear differently depending on the version of windows you are using. On the next page, the advanced options page, you click on Startup Repair. This will take you to a page showing you all windows operating system installed, you then click on the operating system installed on your active partition.
Windows will then diagnose for possible cogs in the wheel preventing proper startup and attempt to repair any faulty processes. If the process is through, windows will inform you if it were successful or unsuccessful and you will be prompted to restart your computer to allow changes take place. If the self-repair process was successful, you’re good to go.
N/B: You will want to create a system repair disc or recovery disc from the System Restore option inherent in the Control Panel.
- Using Command prompt to attempt repairs: A third option is attempting to repair the Master Boot Record directly using bootrec command via Command Prompt, you can find this option on the Advanced Options Page through the System repair options when you try to boot from an installation media. Here are some commands to restore your Master Boot Record (mbr for short).
- In Command Prompt, Type bootrec /fixmbr and press Enter. (This recreates a new Master Boot record compatible with your windows version and is very effective in most cases)
- You can also create a new boot sector, but this overwrites the any previous data in your current partition table and can cause issues only if you’re running several operating systems in your PC. This is also very effective when your boot sector might be damaged possibly by malware attack, so if you feel, a virus is the possible effect preventing startup, feel free to try this option.
In Command Prompt, Type bootrec /fixboot
If Windows Startup issues or bootloader problems persist; you may need to take your system to an expert laptop technician to ascertain if your hard disk is defective.
I would recommend you run Check Disk Utility from the Administrative tools in your control panel; after the recovery/repairs is successful to detect any flaws or defect in your hard disk or storage media. So that you feel assured problems did not arise from defective sectors on your hard disk.
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