FIX: Subst.exe not Working in Windows 10, 8.1

By: Radu Tyrsina
2 minute read
subst.exe fix windows pc

Some users have reported that they are getting problems with running Subst.exe in Windows 10, Windows 8.1 respectively. Here’s how the complaint sounds like:
subst.exe windows 8.1

I have a batch file that I’ve been using since windows xp, all the way up through windows 8.1 beta. 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…

Subst.exe batch file stopped working in Windows 10, 8.1

  1. Run SFC scan
  2. Stop switching between MSAccess XP and MSAccess 2010
  3. Disable your antivirus/firewall
  4. Create a new user account

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.

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, type sfc /scannow to start. After that, just follow the instructions and restart.

sfc scannow

We also recommend you to download this tool (100% safe and tested by us)  to fix various PC problems, such as file loss, malware and hardware failure.

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.

Disable your antivirus/firewall

Sometimes, you antivirus software may block .exe files from 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.

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.

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

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Editor’s Note: This post was originally published in May 2014 and has been since updated for freshness, and accuracy.

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