Which (Windows 10, 11, or 7) are you using? Are you getting a specific error code ?

I can provide more targeted troubleshooting steps to get your connection working.

USB controller conflicts or improper driver registration in the Windows Registry.

The old Sony Ericsson drivers aren't officially hosted anymore, but you can find them on sites like UpdateStar or the XDA Developers Forums. A common version you'll find is .

: Allows raw firmware packages (.ftf or .sin binaries) to be written straight to the phone's internal storage.