: Sometimes, antivirus software mistakenly flags and deletes libisl-*.dll files. Check your quarantine folder or temporarily disable your antivirus to see if the file reappears after a reinstall.
If the error persists, check for 32-bit vs 64-bit mismatches – libisl-23.dll must match the architecture of the executable (x86 vs x64). libisl-23.dll not found
Then add the folder containing libisl-23.dll (e.g., C:\msys64\mingw64\bin ) to your system PATH . : Sometimes, antivirus software mistakenly flags and deletes
Run depends.exe on your program to see exactly which DLLs are missing and from which path it's trying to load. libisl-23.dll not found
The easiest fix is to uninstall the program and reinstall it. This often triggers the installer to properly register the DLLs.