I recently upgraded to Windows 10 from 7, and I am having difficulty with Windows Live Mail 2012 that I didn't have previously before upgrading my OS.

Basically, Windows Live Mail 2012 reports that new emails have been received, and they initially show up in the Inbox as it is supposed to do. However, if one tries to view the email and clicks on it, it suddenly disappears and cannot be found.

I've tried adjusting view, though I'm unsure on how to do this. I've also contacted my ISP (this is not a Windows Live account, I believe it's an IMAP server) and they have tried to help me but have been unsuccessful. They also say that it's nothing on their end. 

I've tried deleting and reinstalling as well, and it doesn't work. Also, the messages don't appear in the actual web client either, so I'm guessing that it has something to do with Windows Live Mail as the messages are being forwarded.

Thank you, I hope this is enough information to go on.