: On your PC, navigate to the Proteus installation folder. This is typically found at:

the library files (typically .LIB and .IDX formats).

Note: For Proteus 8.13+, it may be in C:\ProgramData\Labcenter Electronics\Proteus 8 Professional\LIBRARY .

C:\Program Files (x86)\Labcenter Electronics\Proteus 8 Professional\LIBRARY