Ensure the files were placed in the correct LIBRARY folder and that Proteus was restarted.
If your low-side switch works but the high-side switch fails to trigger, the issue lies within the bootstrap circuit. ir2110 library for proteus 8
Go to your installation directory, usually: C:\ProgramData\Labcenter Electronics\Proteus 8 Professional\Data\LIBRARY (Note: ProgramData is a hidden folder by default in Windows. You may need to enable "Show hidden files".) Ensure the files were placed in the correct