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Discover the causes and solutions to the common ISDone.dll errors that arise during game installation. Our comprehensive guide will smoothly guide you through solving this frustrating problem. Plus, learn how to prevent data loss with our bonus tips.

isdone.dll error
I. About ISDone.dll error
Some large games require a lot of storage space to install and run, and if you do not have enough RAM or hard drive space, it may cause the game to not install smoothly, or even cause ISDone.dll errors.
The possible causes of ISDone.dll errors are as follows:



① Insufficient RAM or hard disk space, or failure of memory and hard disk.

You can try to expand virtual memory and hard disk space, and check whether there are problems with RAM and hard disk.

② ISDone.dll and Unarc.dll files are damaged or missing.

You can try to re-register the dll file.

③ The system file is damaged.

Scan and repair can be attempted using SFC and DISM.

④ Windows firewall and anti-virus software block the game installation.

Temporarily disable the firewall and uninstall antivirus software.

⑤ The third-party application or startup item conflicts with the game installation.

Try entering safe mode or performing a clean boot before installing the game.

II. How to Fix ISDone.dll Error on Windows 10?

1. Increase virtual memory

Windows virtual memory is to use part of the capacity of the hard disk as memory, so as to make up for the lack of physical memory RAM. If the ISDone.dll error is caused by insufficient memory, you can try this method. Specific steps are as follows:
Step 1: Press (Windows logo key + R key) to open the Run box, type (sysdm.cpl) and press (Enter) to open the System Properties window.
Step 2: In the pop-up window, switch to the (Advanced) tab, and click the (Settings) button in the (Performance) bar.
Step 3: In the Performance Options window, switch to the (Advanced) tab and click the (Change) button in the (Virtual Memory) column.
Click the change button in the virtual memory bar
Step 4: First uncheck the (Automatically manage paging file size for all drives) box. Then select (Custom Size), you can enter the increased value (in MB) in the (Initial Size) and (Maximum) fields. You can set the initial size to 400MB, and the maximum value to 3000-4000MB (about 2.5GB (2560MB) for general games is enough, if some games need more virtual memory, you can adjust the value according to the actual situation), then click (Sure). After setting, please restart the computer, try to install the game again, and observe whether the problem is resolved.

2. Increase the hard disk space or change the installation folder

In addition to increasing the RAM size, you should also make sure you have enough hard drive space for large game installations. You can choose to expand the size of the partition where the game is installed, or copy and paste the game installation file to another disk partition with larger capacity for installation. The method of expanding the size of the partition requires unallocated space behind the disk partition. If the disk partition where the game is installed is the only partition in the hard disk, you cannot expand its size through the following methods. You can only solve it by changing the location of the installation folder Insufficient hard disk space problem. The steps to expand the partition size are as follows:
Step 1: Right-click (Start), select (Disk Management).
start disk management
Step 2: After entering Disk Management, right-click the disk partition where the game is installed, select (Extend Volume) and click (Next Page) on the “Welcome to Extend Volume Wizard” page.
Extend Volume Options
If there is no unallocated space behind the partition that needs to expand the size of the partition, but a partition, you need to delete that partition first to make it an unallocated space. Please right-click the target partition, select (Delete Volume) and follow the instructions.
delete volume
Step 3: Set the amount of space for expansion, which can be set to the maximum amount of available space. Then click (Next) > (Finish).
Extend volume selection space amount

3. Check the RAM memory

Corrupted RAM memory can also cause ISDone.dll errors. If the game still cannot be installed after increasing the memory and the hard disk partition space where the game is installed, you need to check whether the RAM memory is normal. Windows’ built-in memory diagnostic tool can help you check your RAM. The specific operation steps are as follows:
Step 1: Press the (Windows+R) keys simultaneously to open the Run window, then type (mdsched.exe) and click (OK) to open the Windows Memory Diagnostic Tool.
run mdsched.exe
Step 2: Next, select the (restart now and check for problems (recommended)) option in the Windows memory diagnostic interface, wait patiently for the diagnostic process to complete, and then restart the computer to see if the problem is resolved.
Reboot now and check for problems

4. Check the hard disk

Hard disk failure may also cause ISDone.dll error, and CHKDSK can help us check and repair hard disk bad sectors or damaged file system. Proceed as follows:
Step 1: Search (cmd) in the search box in the lower left corner, right-click the search result, and select (Run as administrator) to open the command prompt tool.
search cmd
Step 2: In the opened command prompt window, enter the command (chkdsk X: /r /f) (X refers to the hard disk drive letter, which can be changed to the drive letter of the hard disk partition where the game is installed; /r and /f are chkdsk parameters , /r to find bad sectors and restore readable information; /f will try to fix errors found on the disk), and press (Enter) to fix errors. After the fault repair is complete, restart the computer to check whether the problem is resolved.
Enter the chkdsk command

5. Re-register the ISDone.dll file

You may encounter ISDone.dll errors if the ISDone.dll and Unarc.dll files are damaged or missing. Re-registering the file on the system may resolve the issue.
Step 1: Search (cmd) in the search box in the lower left corner, right-click the search result, and select (Run as administrator) to open the command prompt tool.
search cmd
Step 2: Type (regsvr32 isdone.dll) command in the command prompt and press (Enter). After registering the isdone.dll file, type (regsvr32 unarc.dll) and press (Enter) to re-register the unarc.dll file.
Run the regsvr32 isdone.dll command
Step 3: Restart your computer and try installing a game or application to see if the problem is resolved.

6. Use SFC and DISM commands to scan and repair system files

System File Checker (SFC) can find and repair corrupt or missing system files in the system files directory. DISM is usually used to check and repair system image files, and to detect and clean registry items. Proceed as follows:
Step 1: Search (cmd) in the search box in the lower left corner, then right-click (Command Prompt) in the search results and select (Run as administrator).
search cmd
Step 2: In the opened command prompt window, type the command (sfc /scannow) and press the (Enter) key. Next, System File Checker will scan and fix problematic system files.
Enter the sfc command
Step 3: If a problem is detected, but it prompts that it cannot be repaired, please enter the (DISM.exe /Online /Cleanup-image /Restorehealth) command and press the (Enter) key to execute the repair command. After the command is executed, restart the computer and reinstall the game to see if the problem is resolved.
Enter the DISM command

7. Temporarily turn off Windows Defender Firewall or uninstall third-party antivirus software

If you have installed a third-party antivirus software, it is recommended that you close or uninstall it and then try Windows Update. Uninstallation steps: Right-click (Start), select (Applications and Features), select the antivirus software to be uninstalled, and click the (Uninstall) button. Can. If you do not have third-party antivirus software installed, you can also try turning off the firewall, which sometimes blocks the installation of certain programs. The specific steps to turn off the firewall are as follows:
Step 1: Search for (Control Panel) in the taskbar search box in the lower left corner of the Windows desktop, open it, set the viewing method to (small icons), and then click (Windows Defender Firewall).
Windows Defender Firewall
Step 2: Select (Turn Windows Defender Firewall On or Off) on the left side of the new interface, then select the (Turn Off Windows Defender Firewall) option and click (OK). Then install the game again to see if the problem is resolved. If that doesn’t work, you can also re-enable Windows Defender Firewall and try other methods.
turn off firewall

8. Enter safe mode or perform a clean boot before installing the game

Safe mode is a special startup mode in Windows system, which can start our computer without loading third-party device drivers. And clean boot refers to start the system by using the least set of drivers and startup programs, that is, only start the original components and services of the system without starting third-party software and plug-ins. In safe mode or clean boot environment, this can reduce the probability of third-party applications or startup items conflicting with the game installation. For the method of entering safe mode, you can check the content of this article (Comprehensive understanding of what is Windows 10 safe mode and how to enter it).
Here’s how to perform a clean boot:
Step 1: Run the computer, press (Windows+R) keys at the same time to open the run window. Next type (msconfig.exe) and press the (OK) button to open the system configuration window.
run msconfig
Step 2: After opening the system configuration, switch to the (Services) option bar, check (Hide all Microsoft services) and press the (Disable all) button.
disable all services
Step 3: Switch to the (Startup) option bar and click (Open Task Manager).
open task manager
Step 4: Disable all programs displayed on the page. You can right-click the application and select (Disable), or select the current program and click the (Disable) button in the lower right corner. After the operation is completed, close the task manager window, and click (OK) on the system configuration page. You will then see a pop-up window, click the (Restart) button, restart and then try installing the game or application to see if the problem is resolved.
Disable boot programs
That’s all for fixing the ISDone.dll error. If you find that files are missing after the repair is complete or during daily use of the computer, you can check the following methods to scan and restore them.
III. (Extended information) Use Renee Undeleter to recover lost data

1. What is Renee Undeleter?

Renee Undeleter is a professional data recovery software that supports recovery of various types of data such as documents, photos, videos, and compressed files. In the event of accidentally deleting files, emptying the recycle bin, formatting the hard disk, deleting partitions by mistake, as long as the lost data has not been overwritten, this software has a chance to help you scan and recover files. The software has four functional modules: file recovery, format recovery, partition recovery and image creation, which can meet most data recovery needs.
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2. How to recover lost files with Renee Undeleter?

The specific steps to recover files with Renee Undeleter are as follows:
Step 1: Download, install and run Renee Undeleter on a Windows computer, and select the (File Recovery) option on the main interface.
Note: Do not install the software on the disk that needs to recover data, so as not to cause data overwriting. In addition, after the file is lost, please do not save new data to the same disk partition, so as not to damage or completely lose the lost file.
Select file recovery options
Step 2: Next, select the partition where the lost data is located and click on (Next).
Select target device for file recovery
Step 3: Select the (Quick Scan) option and click the (Next) button to scan.
Tips: The quick scan mode only scans the first 30GB of the remaining space of the selected disk. If the desired file is not found after scanning, you can use the deep scan mode to try to scan the hard disk partition again. It will take more time, but more data can be scanned.
File Recovery Quick Scan Options
Step 4: Wait for the scan to complete, you can double-click the file to preview, then check the file to be recovered, click the (Recover) button to restore the file to another disk.
File Recovery Select files to be restored