A: Any file from unofficial sources carries a risk. Check user reviews on the forum where you found it. Scan the file with an antivirus before running it. Be aware of potentially malicious files.
This indicates a driver issue. Re-install the Nokia Connectivity Cable drivers, try a USB 2.0 port instead of a USB 3.0 port, and ensure you only tap the power button for one second during the prompt. Nokia E72 Rm 530 Firmware 091.004