The copy functions cannot be used[Fix]

by Milan Stanojevic
Milan Stanojevic
Milan Stanojevic
Windows & Software Expert
Milan has been enthusiastic about technology ever since his childhood days, and this led him to take interest in all PC-related technologies. He's a PC enthusiast and he... read more
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ERROR_CANNOT_COPY is a system error and it’s usually followed by The copy functions cannot be used error message. This error can prevent you from copying files and installing applications, so today we’re going to show you how to fix it on Windows 10.

How to fix ERROR_CANNOT_COPY error?


Solution 1 – Temporarily disable your antivirus

Antivirus software is important, but sometimes it can interfere with Windows and prevent you from installing certain applications. If that happens, you might encounter The copy functions cannot be used error message. To fix this issue, it’s advised to temporarily disable your antivirus. If disabling antivirus software doesn’t fix the problem, you might have to uninstall it.

Even if you uninstall your antivirus, your PC won’t be vulnerable because Windows 10 comes with Windows Defender that works as a default antivirus. Keep in mind that antivirus tools can leave certain files and registry entries behind. These files can also cause this problem to appear, so it’s recommended to use a dedicated removal tool that will find and remove these files automatically. Most antivirus companies offer dedicated removal tools for their software, so be sure to download one for your antivirus.

After removing your antivirus software, check if the issue still persists. If you manage to install the application, be sure to install the latest version of your antivirus software or switch to a different security solution. Almost any antivirus can cause this error to occur, but users reported issues with McAfee, so if you have this application installed be sure to remove it and check if that solves the issue.

Solution 2 – Copy the installation files to the root directory

If you’re getting this error while trying to install certain applications, you might be able to fix it simply by copying installation files. If you’re running setup from a USB flash drive or optical media, copy the installation files to the root directory such as C: and try to run the setup file again.

Some users are also recommending to disable your antivirus before starting the setup, so be sure to do that as well.

Solution 3 – Change setup.ini file

According to users, this error can occur while trying to install Autodesk software. To fix this problem, first you need to copy all installation files to your hard drive. After doing that, you need to locate setup.ini file and edit it. You need to edit EXTRA_FILES line and depending on the software you’re trying to install you need to change it as follows:

  • For Autodesk Fabrication CADmep 2014: EXTRA_FILES=CADmepDBX;*.exe:*.pit:*.xml:*.mc3:*.mlm:3rdParty:CER:%lang%:EULA:NLSDL:Setup:SetupRes:Third-Party Component Open Source EULAs
  • For Autodesk Fabrication CADmep 2016: EXTRA_FILES=CADmep;*.exe:*.pit:*.xml:*.mc3:*.mlm:3rdParty:CER:Content:%lang%:EULA:NLSDL:Setup:SetupRes:Third-Party Component Open Source EULAs
  • For Autodesk Fabrication ESTmep 2016: EXTRA_FILES=ESTmep;*.exe:*.pit:*.xml:*.mc3:*.mlm:3rdParty:CER:Content:%lang%:EULA:NLSDL:Setup:SetupRes:Third-Party Component Open Source EULAs
  • For Autodesk Fabrication CAMduct: 2016:EXTRA_FILES=CAMduct;*.exe:*.pit:*.xml:*.mc3:*.mlm:3rdParty:CER:Content:%lang%:EULA:NLSDL:Setup:SetupRes:Third-Party Component Open Source EULAs

After making the changes to the setup.ini file, save them and try to install the application again.

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Solution 4 – Give Everyone access to the setup folder

Several users reported this error while trying to install AutoCAD on their PC. If you’re having the same problem, you might be able to fix it by changing few security settings. To do that, follow these simple steps:

  1. Locate the setup directory, right click it and choose Properties from the menu.
  2. When Properties window opens, go to Security tab and click on Edit.
  3. Click on Add button.
  4. In Enter the object names to select field enter Everyone and click on Check Names button. Now click OK.
  5. Now select Everyone from the Group or user names section and check Full control in Allow column. Click Apply and OK to save changes.

After doing that, all users will have full access to that directory and you should be able to install the application without any errors. Even though this solution is related to AutoCAD, you can also try it with other problematic apps.

Solution 5 – Try cleaning your optical disc

The copy functions cannot be used error message can appear if you’re trying to install software from optical media. To fix this problem be sure to clean your optical disc. To do that, simply remove the optical media and clean it gently with a soft cloth from middle to edges. After doing that, check if the problem still appears.

Solution 6 – Insert the disc to another drive

If this error still appears on your PC, you might be able to fix it by inserting it to another DVD drive. Sometimes your DVD drive might not work properly, and it that’s the case, we advise you to insert a disc to another DVD drive on your PC and check if it works. If you don’t have an extra DVD drive, you can try inserting the disc on a different PC to check if it works.

Solution 7 – Perform Clean boot

Certain applications can cause compatibility issues and prevent you from installing new software. Sometimes these applications and their related services can start automatically with Windows, and that can cause this and other errors to appear. To fix the issue, you need to perform Clean boot and disable all these apps. To do that on Windows 10, follow these simple steps:

  1. Press Windows Key + R and enter msconfig. Press Enter or click OK.
  2. Go to Services tab and check Hide all Microsoft services option. Now click on Disable all button.
  3. Navigate to Startup tab and click on Open Task Manager.
  4. When Task Manager opens, you’ll see a list of all startup applications. Select each application on the list and click the Disable button.
  5. Once you disable all startup applications, close Task Manager. Go back to System Configuration window and click on Apply and OK.

After making these changes, restart your PC or log out and log back in to your Windows 10 account. After doing that, try to install the problematic application again. If you manage to install the app, repeat the same steps and enable all startup apps and services.

ERROR_CANNOT_COPY and The copy functions cannot be used errors can appear on almost any PC and prevent you from installing certain applications. This can be a problematic error, but you should be able to fix it by using one of our solutions.


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