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Nexus Mod Manager (NMM) software sometimes displays the error “Nexus mode manager – a problem occurred during install”. It is quite disturbing to see such errors while installing any software program.

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NMM is one of the best software that manages the mods you want to install for tweaking any games on your laptop or computer. Nexus Mode Manager tool does this work very easily.

The “a problem occurred during install” error is reported when users try to install mods for some of the games on their computers or laptops.

Let us discuss what are the causes of this error and how it can be fixed in this article.

Causes of NMM “A Problem Occurred During Install” Error

There are various reasons why NMM displays an error message when you try to install a mod for a game on your computer or laptop. Some of the possible reasons are listed below.

NMM may not have the required file permissions. Antivirus programs and Windows defender may block the program from executing. Outdated versions of Nexus Mod Manager can cause this error when you are trying to install a mod for the game. Space constraints are another major problem as mods when installed normally take up to 10 times the space required for the related uncompressed files.

How to Fix Nexus Mod Manager Error ‘A Problem Occurred During Installation’

There are different methods to fix the NMM mod installation errors. I will write in detail about those fixes below.

1. Disable Antivirus Program / Windows Defender

Sometimes, the Windows Defender program or third-party antivirus programs may prevent NMM from executing the mod installation program from running.

Disabling the antivirus software program differs from one software to another. Please check the FAQ section on the web sites of the antivirus software manufacturer as to how to disable their antivirus software program. If Windows Defender is enabled, you can normally see the shield icon on the taskbar. Make sure that you disable it when installing the game mod. In general, any antivirus software or Windows Defender software can be disabled as follows.

Locate the icon for the antivirus program in the system tray located on the lower right corner of the taskbar.Right-click on it.Select the “Disable” option.For disabling the Windows Defender, right-click on the shield icon on your taskbar and click on “Open”. Then, select “Disable”.If you don’t see the windows defender icon, open the Settings app by typing “Setting” into the taskbar search window and then selecting the “settings” app.Click the “Update & Security”. Select “Windows Security” on the left side.Click on “Open Windows Security” or “Open Windows Defender Security Center”. It may vary across different versions.A new Windows pop-ups.Click on the shield icon (the second icon on the left side), below the home icon.Now, Click on “Manage settings” under “Virus & threat protection”.Click on “Real-time protection”. Make the value “Off’ by clicking on the value “On” and confirming the action by clicking “Yes”;Click on “Cloud-delivered protection”. Make the value “Off’ by clicking on the value “On” and confirming the action by clicking “Yes”.Click the “App & browser control” menu shown on the right-side.Make the value of “Check apps and files” to “Off”, by clicking on the “Off” radio button and then confirming by clicking on “Yes”.Close any open windows.Restart the computer and see if the problem is resolved or not.If the problem is resolved, enable the Windows Defender program or the antivirus program which you disabled.

2. Run NMM as Administrator

Sometimes, the Nexus Mod Manager (NMM) may need system-wide admin privileges to run certain files. Though not recommended for all programs, a Microsoft verified program like NMM can be run as administrator.

Locate NMM’s folder on the computer or laptop. C -> Program Files or C -> Program Files (x86) is the default folder.Locate the executable file Nexus Mod Manager in the NMM folder.Right-click this file name. Now, select “Properties”.Click on the “Compatibility” tab.Please check the box corresponding to “Run this program as an administrator”.Click “Apply”. Click “Ok”.Check if the problem is resolved or not.

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3. Get the Latest NMM Version

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Nexus has stopped support for the application program. It is now a GitHub project and some old NMM developers are still adding new builds. Some of the old build versions may cause the reported installation error. You need to uninstall the old version of NMM and install the latest NM version to avoid the installation errors.

Type “Control panel” (without the quotes) in the search bar inside the taskbar.Select the “Control Panal” app. Click on “Uninstall a Program”Locate the Nexus Mod Manager and click on the name. Click on the “Uninstall” button.Press “Yes” to confirm the action.Follow the instructions on- your screen.Now, restart the computer.Check if the problem is resolved or it still persists.

Note: You will not be losing any previously installed mods. The uninstall process displays the message that the installed mods will stay intact.

4. Space Contraints

It is known that NMM mod takes up tp 10 times their original compressed file size. This causes space constraints on many computers and laptops. Normally, 6 GB to 8 GB is required for some mod installations. The possible solution to free up disk space is given below.

Delete any files that you do not need anymore. Examples are files in the “Downloads” folder.You can reduce the size allocated to “Recycle Bin” or totally remove the space allocated to “Recycle Bin”. Please bear in mind that files will be deleted immediately if there is no space allocated to “Recycle Bin”. i.e. You can not restore deleted files if there is no space allocated to recycle bin. You may change this back after the issue is resolved.Uninstall any application programs that you don’t use.Move large data files to another hard disk drive.Move any large data files to the cloud storage like Google Drive. Check if the problem is resolved.

5. Install Mod in Safe Mode

Booting the computer in safe mode and then installing the mod is another fix. Safe Mode in windows disables many device drivers from loading. Only the basic drivers needed for the OS to work are loaded in safe mode. To restart the computer in Safe mode, do the following.

Press the Windows and R key together.Type msconfig in the new window and press the enter key.Click on the “Boot” tab.Check the box “Safe mode”. Click “Apply”.Click “OK”.Now, click “Restart”.Once the computer restarts, try to install the mod.Check if the problem is resolved or not.Repeat steps 1 to 3.Uncheck the box “Safe mode”. Repeat steps 5 to 7.

Conclusion: NMM sometimes displays the error message “a problem occurred during install”. It can happen due to many reasons. A lack of file privilege can be a major reason. Windows Defender and third-party antivirus software applications also cause installation errors during NMM mod installation.

The error can be resolved by disabling the Windows Defender and any third-party virus protection software. Another fix is to run the NMM as an administrator. NMM tool is no more supported by original developers. GitHub community now develops builds for any issues. If you are using any previous build which is causing the error, get the latest build downloaded and installed.

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Lack of space on the hard disk drive or solid-state drive can also cause the installation error. This can be avoided by deleting any unwanted or non-used files and uninstalling any applications which are not used. Moving large files to the cloud storage area like Google Drive or to another disk drive can also save space on your NMM disk, thus allowing the installation to proceed without errors.

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