> Invalid System Disk

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

Invalid System Disk. Replace the Disk, and Press Any Key

Have you ever encountered this "Invalid system disk. Replace the disk, and press any key" error message when you boot into Windows? Generally speaking, a large number of users have encountered this "invalid system disk" error according to a survey. BUT, how did you solve this issue? Is it possible to fix invalid system disk error in Windows 10/8/7 without losing data? If you haven't yet found a suitable solution to solve it, here are a few troubleshooting suggestions you may want to try.

invalid system disk

4 Main Reasons for "Invalid System Disk" Error in Computer

The "Invalid system disk. Replace the disk, and press any key" error message can happen for a variety of reasons. Here, we list 4 main reasons.

1. Corrupt boot disk.
This is the most common reason. You will receive the invalid system disk error in Windows 10/Windows8/Windows7 if the bootable disk gets corrupt somehow. It is recommended to check whether the boot disk is about to die if it has been used for a long time in the computer.

2. The boot order is false.
If you have several disks in your computer and the internal disk is not set as the first boot disk, then you tend to receive such errors. Therefore, you need to check whether you have set the right disk for computer boot.

3. Virus infection.
Virus can lead to a mass of troubles. If a virus attacks your computer successfully, it will change or destroy the process of computer booting entirely and then prompt such errors.

4. The boot record of system drive is corrupted.
If the boot record of system drive is corrupted, you are likely to receive an error message saying "invalid system disk."

After knowing the cause, you might want to know how to fix invalid system disk.

Recover Data before Fixing Invalid System Disk Error in Windows 10

It is recommended to recover lost data if you have any important files stored on the PC's hard drive in case data loss happens while you are trying to troubleshoot invalid system disk error.

Now, you might be wondering:
"How to recover data from PC easily and quickly?"

MiniTool Power Data Recovery, a professional data recovery software developed by MiniTool Solution Ltd., is a wise choice for you. This professional tool offers wizard-like interfaces as well as simple operations to help users easily recover data without any difficulty. More importantly, it is a read-only tool. Thus, you can use it to recover lost data without affecting the original data. Here, as we cannot boot Windows because of the "Invalid system disk. Replace the disk, and press any key" error message, we can try using the MiniTool Power Data Recovery Bootable 7.5 to carry out data recovery. Note: Only the Deluxe and above versions offer MiniTool Bootable Media Builder, and here we take Personal Deluxe for example.

Step 1. Get MiniTool Power Data Recovery Personal Deluxe from the following button, and install it on another computer.

Step 2. Launch MiniTool Power Data Recovery, and then click on this icon in the bottom of the main interface to create bootable CD, DVD, or USB flash drive.

Bootable Edition

Step 3. Boot your Windows with the bootable drive to get its main interface as follows.

damaged partition recovery

Step 4. Now, select a suitable data recovery module to recover data from PC with invalid system disk error. Here, you can try using Damaged Partition Recovery. In fact, you can use this module to effectively recover lost data as long as the partition exists. However, if you want to recover data from the partition which is deleted by accident or lost due to installing Windows OS, you had better click on the Lost Partition Recovery; if you want to recover deleted files from CD/DVD or recovers files from formatted CD/DVD, you can click on the CD/DVD Recovery; you can click on Undelete Recovery to recover deleted files and folders no matter it is deleted by yourself or viruses; and you can try Digital Media Recovery to quickly recover data from digital media in the event of any problems occurring.

Step 5. After that, select the target partition and then click on Full Scan button which is located at the lower right corner to scan the entire device to find desired data.

full scan

Importance: In this window, you can click on the Settings feature to make MiniTool Power Data Recovery scan needed files only by file systems and file types. For example, if you just want to recover photos, you can only check the option "Graphics/Pictures", click on OK button, and choose Full Scan to scan the drive containing lost data, as shown below.

settings

Step 6. After the full scanning, you are supposed to select all needed files and then click on Save button to appoint a saving path to store them.

save

Note: In this window, if you do not know whether a file should be recovered, the feature Preview makes it possible to view pictures and txt. files before recovering, as shown below.

preview

With data safely transferred, you can begin to fix invalid system disk error.

How to Fix Invalid System Disk Error in Windows 10/8/7

As we know, it is a common problem that people cannot boot their computer because of the invalid system disk error. Here, we offer several simple ways to help you solve the "Invalid system disk. Replace the disk, and press any key" error in Windows 10/8/7. Even you're a green hand, you can easily work it out.

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.

Download and install MiniTool Partition Wizard in another computer. TIP: It is recommended to choose MiniTool Partition Wizard Pro.

Launch MiniTool Partition Wizard, and then select Bootable Media to create a bootable CD or flash drive.

PW boot media

Connect the burned MiniTool bootable disk to your PC with invalid system disk error, and then boot from it.

Then, you will see the following interface where you can select "Partition Wizard" to the main interface of MiniTool Partition Wizard.

partition wizard

Select the target partition, and choose "Check File System" from the Check Partition group or from Partition menu.

check file system

You will see a new window with two options: Check only and Check & fix detected errors. If you only want to check, select Check only; if you want to recover mistakes during the checking process, select Check & fix detected errors. After that, click "Start" button.

start check and fix errors

Tip: this operation will not be added to pending operations. Once you click "Start", MiniTool Partition Wizard will check/fix file system immediately.

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.

  • Download and install MiniTool Partition Wizard Pro in another computer to create a bootable CD or flash drive.

  • Boot your Windows with invalid system disk from the bootable disk, and then follow the wizards to get the main window of MiniTool Partition Wizard.
  • Now, select the system disk and click on "Rebuild MBR" from the left panel.

    rebuild mbr

  • At last, click "Apply" button on the top left corner to apply the change.

After that, you can restart your PC. If you still get the "invalid system disk replace the disk and press any key" error, please refer to the following method.

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.

startup 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.

Please note: It is recommended to recover your data from your PC with invalid disk system error before reinstalling Windows. If you don't know how to recover lost data since your Windows cannot boot, you can find answers from this post: Recover Data When PC Won't Boot.

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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Bottom Line

At the end of the post, I want to stress again that you had better recover lost data in advance in case data loss happens while you are trying to troubleshoot invalid system disk error.

Hope these solutions help you. If you solved the invalid system disk problem by using another method, please share it with us in the following command, thanks.

If you have any questions about using MiniTool software, please feel free to contact us via [email protected] We will solve it as soon as possible.