Windows 10: Download Failed, Warning And Mysterious CRDOWNLOAD File Shows Up

I recently download Skype, for free on the Microsoft site. But I got this error:

"Microsoft Defender Smartscreen was not able to scan Skype.exe. You shouldn't keep it unless you're sure it's safe."



And then this shows up on my desktop.



It's called Unconfirmed321132.crdownload. I'm not sure if any of these are safe, so I wanted to ask.

:)

 

Reg/batch to disable "Open File - Security Warning"


I used step 5 and this was down loaded "Unconfirmed 440011.crdownload" and it is only 1KB

 

Reg/batch to disable "Open File - Security Warning"


I just tried step 2 and this was down loaded Unconfirmed 496959.crdownload and it also is only 1KB

 

Files all downloaded but last part of setup failed


Hi. I was invited to download/install Windows 10 and I followed all the steps to download the files. Then I clicked to install it and it seemed to be doing it. Windows closed down and the computer restarted, but when it opened again it was still Windows 7 and there was a box up relating to Windows upgrades that that said the 'latest upgrade' had failed, and there was a button to click to download Windows 10 if I wanted to (again?!). I don't know where all the files are that were downloaded and what I should do. I saw a suggestion somewhere that firewall/antivirus software can be a problem. I have Bitdefender, that doesn't allow you to disable it.. I suppose I could remove it completely before trying again? But otherwise what should I do? I don't want to download a lot of duplicate files again.

Thanks for any suggestions.