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AlexBell · 07-07-2018, 02:36 AM

I know this isn't a calibre problem, but I can't get any help from the Windows 10 forum. Can anyone help here?

I'm almost certain that there was a Windows 10 upgrade recently, but I don't know enough about Windows to be sure, or even to be able to use the Windows 10 forum.

I downloaded the latest calibre upgrade a couple of days ago - I've been using calibre for years without problem. When I tried to run it a big blue screen appears on the Windows screen saying
'Windows Defender Smartscreen prevented an unrecognized app from starting. Running this app might put your PC at risk.'

It doesn't give me any option to run the upgrade. If I had to choose I'd rather have calibre than Windows Defender. Can anyone tell me how to turn Windows Defender off? Or how to use the Windows 10 forum to try to get some sense from them?

07-07-2018, 02:36 AM	#1
AlexBell Wizard Posts: 3,413 Karma: 13369310 Join Date: May 2008 Location: Launceston, Tasmania Device: Sony PRS T3, Kobo Glo, Kindle Touch, iPad, Samsung SB 2 tablet	Windows 10 won't let me upgrade calibre I know this isn't a calibre problem, but I can't get any help from the Windows 10 forum. Can anyone help here? I'm almost certain that there was a Windows 10 upgrade recently, but I don't know enough about Windows to be sure, or even to be able to use the Windows 10 forum. I downloaded the latest calibre upgrade a couple of days ago - I've been using calibre for years without problem. When I tried to run it a big blue screen appears on the Windows screen saying 'Windows Defender Smartscreen prevented an unrecognized app from starting. Running this app might put your PC at risk.' It doesn't give me any option to run the upgrade. If I had to choose I'd rather have calibre than Windows Defender. Can anyone tell me how to turn Windows Defender off? Or how to use the Windows 10 forum to try to get some sense from them?