If you need legal portability, consider using KiCad (v7/v8) with portable installers, or LTspice for analog. If you specifically require PIC/AVR simulation, invest in a USB dongle license from Labcenter.
| Feature | Proteus Portable 8.8 | KiCad (Native) | LTspice (Portable) | | :--- | :--- | :--- | :--- | | | High (if cracked/custom) | Low (requires install) | Medium (lightweight) | | MCU Simulation | Excellent (PIC, AVR, 8051, ARM) | None (no simulation) | None (analog only) | | PCB Layout | Professional (ARES) | Professional (Free) | None | | Legal Cost | High risk (illegal copies) | Free (Open Source) | Free (Analog Devices) | | Disk Footprint | ~1.2 GB | ~3 GB | ~100 MB | Proteus Portable 8.8
Set the library paths to relative paths (e.g., .\LIBRARY instead of C:\Program Files\ ). This ensures the portable app finds parts when moved between drive letters (E:, F:, G:). If you need legal portability, consider using KiCad
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