Here Are 6 Ways to Fix Invalid System Disk Error in Windows 10/8/7


Have you ever encountered this "Invalid system disk. Replace the disk, and press any key" error message when you boot into Windows? Is it possible to fix invalid system disk error in Windows 10/8/7 without losing data?
Solution 1. Set the Bootable Disk as the First Boot Disk
As we know, if you set an unavailable disk as the first boot disk, you will receive the invalid system disk error message. Now, you can set the bootable disk as the first boot disk to fix invalid disk system error in Windows 10/8/7.

You can unplug any USB flash drive, external hard drive, CD or floppy disk if you want to boot from the internal hard disk. However, if you want to boot from a removable disk, you have to make sure it is bootable and set it as the first boot disk. Now, you can try the following steps to change the boot order.
Step 1. Start the computer and go to BIOS setup.
Step 2. Use the arrow keys to select the BOOT tab.
Step 3. Move the boot disk to the first position in the list.
Step 4. Save the Boot order changes and exit BIOS.
Step 5. Start the computer with the new boot order.

Solution 2. Check and Repair Disk Errors
If you still receive the invalid system disk error in Windows 10 after changing the boot order, you can check and repair disk errors because disk corruptions also result in this error. However, how?

MiniTool Partition Wizard is recommended here. With this powerful tool, you can easily and quickly complete this task without any difficulty.
Solution 3. Repair Master Boot Record
MBR, Master Boot Record, is a boot sector at the very beginning of computers' hard drive and records the information of all partitions. Corrupted MBR is a common reason for the appearance of invalid system disk error. Now, try using MiniTool Partition Wizard to rebuild MBR to exclude this factor.
Solution 4. Perform an Automatic Repair
Some users recommend performing the Automatic Repair or Start-up Repair to remove out the "invalid system disk replace the disk and press any key" error. However, sometimes, Windows Automatic Repair not working issue will happen. For more details about this issue, please check this post: How Do I Solve - Windows Automatic Repair Not Working.

Here are the steps to make Start-up Repair work.

Insert the Windows bootable drive and boot from it.
Select your language preferences, and click on Next button.
Click on Repair your computer.
Click on Troubleshoot > Advanced options, and select Start-up Repair.

Solution 5. Reinstall Operating System
Some users reported that the "invalid system disk replace the disk and press any key" issue might be caused by a damaged operating system. In this case, how to fix invalid system disk? Reinstalling operating system might be the best choice for you to make your hard disk bootable again.

Solution 6. Replace Hard Drive
If none of the methods helps, I am afraid you may encounter a hard drive failure issue, and you have to replace a hard drive and reinstall Windows to fix the invalid system disk error in Windows 10/8/7. Please note: before replacing the damaged hard drive, you had better recover its data via MiniTool Power Data Recovery.

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Created by Baojin Lee 3 years 45 weeks ago – Made popular 3 years 45 weeks ago
Category: Technology   Tags: