OK, thanks. I’m running a fresh install of Windows 10. I think the update that stopped it working for me was
“Cumulative Update for Windows 10 for x64-based Systems (KB3116869)”
I haven’t tried reverting it, would rather find a solution that works without doing that.
In case it’s of any use for the devs, my entire update history at the point where it stopped working (most recent at the top) was :
“Definition Update for Windows Defender – KB2267602 (Definition 1.211.2615.0)”
“Windows Malicious Software Removal Tool for Windows 8, 8.1, 10 and Windows Server 2012, 2012 R2 x64 Edition – December 2015 (KB890830)”
“Cumulative Update for Windows 10 for x64-based Systems (KB3116869)”
“Security Update for Internet Explorer Flash Player for Windows 10 for x64-based Systems (KB3119147)”
“Definition Update for Windows Defender – KB2267602 (Definition 1.211.2364.0)”