FIX: Subst.exe not working in Windows 10/11

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Updated onFebruary 21, 2024

updated onFebruary 21, 2024

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Some users have reported that they are getting problems withrunning Subst.exe inWindows 10. Here’s how the complaint sounds like:

I have a batch file that I’ve been using since windows xp, all the way up throughwindows 8.1beta. Since I installed the full 8.1 this week, the batch file quit working: SUBST.EXE L: c:developmentclientname

I tried right/click run as administrator, and it sorta works…interestingly…with MSAccess XP. But MSOffice 2010 products don’t recognize the drive letter in the File Open dialog box, and Windows Explorer doesn’t display the L: drive.

However, if I go to a command prompt and type L: and press enter, it recognizes and goes to the L: drive…. I tried running the command line directly from command prompt (admin) and same results…

How can I fix subst.exe batch file stopped working inWindows 10?

The thread is still open on the Microsoft community forums and we’re keeping a keen eye on it, in the eventuality that a working solution will be provided.

Meanwhile, here are some solution suggestions that may help you fix the problem.

1. Run SFC scan

Those who are affected by this should try first a System File Check just to make sure all system files are in place.

If this doesn’t work, then you can go ahead and from an admin command prompt, typesfc /scannowto start. After that, just follow the instructions and restart.

2. Stop switching between MSAccess XP and MSAccess 2010

For some, the issue has been generated by the fact that users switch often between MSAccess XP and MSAccess 2010, so if you’re doing the same thing, stop.

3. Disable your antivirus/firewall

Sometimes, your antivirus software mayblock .exe filesfrom running on your computer. You can turn off your antivirus tool, as well as your firewall , and check if the Subst.exe file now works.

Don’t forget to enable your antivirus and firewall protection after you completed the tests.

4. Create a new user account

Other users suggested that creating a new user account may fix this problem. While this solution works only in rare cases, do give it a try as it may help you fix the problem.

To learn more about hidden files, we also have a guide that explainswhat is NcsiUwpApp, so you might want to visit it.

So, just in case you know additional working fixes, do let us know and we’ll inform those affected.

FIX: Subst.exe not working in Windows 10/11#

How can I fix subst.exe batch file stopped working inWindows 10?#

1. Run SFC scan#

2. Stop switching between MSAccess XP and MSAccess 2010#

3. Disable your antivirus/firewall#

4. Create a new user account#