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I've plugged the dongle into my PC. The instructions say it should install software, but it hasn't done that, or come up with any prompts. I can see it under my list of devices though, and Windows says it's working properly. How can I make it install the software?
Could a firewall or security suite be impeding the install ?
Can you try unplugging it and start again.
Are relevant drivers up to date.
I recall when I used Windows 7 sometimes I had to run things as an administrator.
Current Phone > Samsung Note 9 _512Gb > Model: SM-N960 Hybrid-Duos.
Samsung One Ui / Pie.
Samsung Gear s3 Frontier Watch.
Maybe the dongle didn't include the right version of the software for your version of Windows?
There is some potentially useful information to be found on http://www.vodafone.com/content/index/what/devices/vmb.html
Also look under the Extras tab on that page.