Avoid shady "automatic installer" websites that bundle adware. Stick to known engineering forums.
C:\Program Files (x86)\Labcenter Electronics\Proteus 7 Professional\LIBRARY Step 2: Paste the Downloaded Files
I can now search for specific MCP2515 Proteus library download links if you want — should I look them up? mcp2515 proteus library link
If Proteus is open, close and reopen it to refresh the library.
: Features three transmit buffers and two receive buffers with prioritized message storage. If Proteus is open, close and reopen it
Copy the existing USERDVC.LIB and DEVICES.IDX files to a backup folder. If you corrupt the index, Proteus will crash.
: Close and reopen the software. You can now search for "MCP2515" in the component picker to place it on your schematic. Essential Firmware Libraries If you corrupt the index, Proteus will crash
Once you have located a download link and obtained the .LIB and .IDX files, follow these steps to add them to your software: