Ever since its inception, the software has evolved to become a definitive suite for basic virus protection on Windows machines. However, users with low-end hardware might find that Windows Defender takes a chunk of their limited system resources.
I have also started backing up systems files and look for the .dll in the backup. The file may not be the newest but I know its safe. Manufacturers are usually the best source for any type of downloads…. Find the trusted and reputable sites and stick to them…..
If you were successfully able to install the game or software, then enable the Antivirus again. In case you were unable to and got the isDone.dll error again, keep the Antivirus disabled and carry out the next method. After the restart, try to install the game or the software and see if it returned the isDone.dll error. If the install was successful, then run a DISM scan. This case is a bit more interesting than the previous one. This use case includes a legit application. However, the application is dynamically loading another executable in memory, which appears to be download a DotNET executable.
Click on the Disable Windows Defender or Enable Windows Defender button to turn Off or turn On the Windows Defender / Microsoft Defender application. You can use Registry Editor to disable Windows Defender. Before going further make sure, you take a backup for Registry Editor as a wrong action could let your device malfunction. Well, if you are thinking of using Windows native security app, Windows Defender, let me explain a few things about it.
It states that victims have to pay $200 in Bitcoins for the decryption software. In order to get further payment information, it instructs to contact the attackers using the email address.