Invalid MS-DOS Function: How to Fix This File Error

Repairing the corrupted files can fix MS-DOS errors on your PC

3 min. read

Updated onOctober 4, 2023

updated onOctober 4, 2023

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Key notes

Advanced PC users use Command Prompt to perform commands quickly, but many reported anInvalid MS DOS functionerror while trying to do that.

In case you’re not familiar with this feature, we have a great guide that will explain whatDOS Command Promptis, so be sure to check it out.

To tackle this issue, it’s important to understand what causes it, so keep reading to find out everything you need to know.

Why does an Invalid MC DOS function message appear?

There are several reasons for this issue, but the most common are the following:

How do I fix Invalid MS DOS function?

Fixing this issue is relatively simple, but before we do that, make sure you try the following:

1. Run the SFC command

Once the command is finished, check if the problem is still there. In case you’re not able to run SFC or if it didn’t fix the issue, run these two commands as well:

DISM.exe /Online /Cleanup-image /Scanhealth

DISM.exe /Online /Cleanup-image /Restorehealth

2. Run chkdsk scan

After the scan is finished, check ifInvalid MS DOS functionerror is gone.

3. Modify the registry

These are just some of the solutions that can help you fix anInvalid MS DOS functionerror on your PC. In most cases, the issue is related to file corruption.

If you’re having more issues, we suggest reading ourcan’t run CMD as an administratorguide for more potential solutions.

What method did you use to fix this issue? Share it with us in the comments section below.

Invalid MS-DOS Function: How to Fix This File Error#

Why does an Invalid MC DOS function message appear?#

How do I fix Invalid MS DOS function?#

1. Run the SFC command#

2. Run chkdsk scan#

3. Modify the registry#