I have an Ubuntu One account setup in 11.10. I've sync files and it works perfectly.

However, at work, I can only use Windows OS, so I've installed U1 for Windows. The computer at work is a shared computer, thus I am trying to find ways how to keep my sync files safe from unauthorized access.

There are two issues that I'd like to fix:

First: U1 automatically starts and connect upon boot.

I have already unchecked the "Connect automatically when the computer starts" option from the Settings tab and rebooted several times, still U1 automatically starts on system boot and appears at the system try. This means that whoever logs into the computer can just click U1 from the system tray and access my files.

How do I resolve this?

Second: U1 automatically signs on to my account.

Even with the first issue resolved, my files are still vulnerable since U1 can be launched with just one click from the start menu which then automatically signs into my account without asking for a password (shown below).

Is there a way to force U1 to prompt for a password?

I know I could just setup a password to the sync folders in the Windows Explorer but what would prevent someone from accessing my files (those which I choose not to sync)? Since the U1 window automatically signs into my account, someone could just easily tick the "Syn locally?" box and access the files.

Or I'd be better off accessing the files from the browser - downloading them and uploading (again) - than syncing them?