The most frequent cause is corrupted installation files due to an interrupted download.
Windows will scan all protected system files and replace corrupted ones. Once completed, restart your PC and test the installer. 4. Re-Register the ISDone.dll and Unarc.dll Files isdonedll error unarcdll error7 best
. If you are using Windows Defender, you can turn off Real-time protection for a short period. Additionally, temporarily disable the Windows Defender Firewall . After disabling these protections, run the installer again as an administrator. Crucially, do not forget to re-enable your security software after the installation is complete. The most frequent cause is corrupted installation files