Errors and bugs can pop up on your Windows device, no matter how well you maintain it. One such error is related to your computer’s disk, which can prevent your system from booting up properly and restrict access to your files and applications.
Let’s look at various methods to repair the disk issue on your Windows device.

Why Does the “Repairing Disk Errors” Issue Occur?
When the disk error occurs, your computer reboots with an error message: “Repairing disk errors. This might take over an hour to complete.” Most of the time, this error will just show up once and won’t appear the next time you reboot, but sometimes it will show up every single time you boot your PC.
Usually, this error is caused by:
Now let’s look at possible troubleshooting ways to fix the repairing disk error on your Windows device.
1. Start With These Basic Fixes
When your Windows computer starts showing disk errors, there are a few initial steps you can take before moving on to more advanced solutions. Here’s what we recommend doing:
If the above solutions are not working for you, it’s time to get started with the advanced troubleshooting methods.

2. Run the Startup Repair Utility
The Startup Repair tool is a built-in Windows feature to fix problems preventing your computer from starting correctly. This tool can be a lifesaver if your system keeps encountering errors when booting up.
Here’s how you can use the Startup Repair tool on your computer:

The repair tool will then scan for any corrupted files to repair. If this doesn’t work, check outwhat to do if Startup Repair fails to fix your PC.
Once the repair process begins, avoid interrupting it or turning off your computer. Doing so could corrupt Windows even further.

3. Run the SFC and CHKDSK Tools
If the startup repair tool does not work, it’s time to use the Command Prompt to run the System File Checker and CHKDSK tool.
The System File Checker (SFC) tool checks your computer for any buggy system files and then tries to fix them. Most of the time, this resolves the disk error issue and otherstartup issues on Windows.

Follow the steps given below to use the System File Checker and CHKDSK:
The above-given commands initiates a thorough scan of your system. It might take a while, and once completed, you should no longer see the black screen on startup.
If you cannot access your desktop, you’re able to also run the Command Prompt and the given commands via Windows safe mode.
If these commands came in handy, be sure to check out all thebuilt-in Windows tools that repair corrupted system files.
4. Update the Disk Controller Driver
The “disk controller driver” usually appears under a variety of names, like “Standard SATA AHCI” Controller. It is a Windows driver that establishes communication between your operating system and your hard drive. If the disk controller driver gets outdated, it can lead to disk-related errors.
Follow these steps to update the disk controller driver on your PC:
5. Try a Third-Party Disk Repair Tool
Sometimes the in-built Windows tools for troubleshooting are of no use. So, you have to depend on third-party tools to investigate the issue. We’ll use a free tool called Macrorit Partition Expert for this guide.
Third-party disk repair tools are not a sure-shot fix. They sometimes work and sometimes create more trouble with the system. So, before using any tool,create a restore point on Windowsas a backup.
Here’s how to use the Macrorit Partition Expert tool on Windows:
Now, Macrorit Partition Expert will analyze your selected disk to check for any bad sectors and try to fix them.
6. Factory Reset Windows
If none of the fixes were helpful, you must reinstall Windows OS as a last resort. This will wipe all the data from your computer, so ensure to back up your important data.
Once you’ve backed up your files, check outhow to factory reset Windows. Once the reinstallation is complete, you’ll have a clean slate to work with, and you may restore all the files you’ve backed up.
No More Disk Errors on Windows
As said earlier, there’s no fixed reason for the repairing disk error. However, one thing that causes the error is an issue with your disks, such as bad sectors, physical damage, and viruses.
If you fail to resolve the issue, consider resetting your computer and fresh set up everything.