I've been on the new Outlook.com for some time now but have found at some point this evening, all of the emails in my inbox have disappeared, bar 3 or 4 - I had not changed anything on my account and my sent items are intact.

Initially concerned that I may have been hacked, I've changed my password, but I can see others have had problems with missing emails when nothing has been done their end - Microsoft, please investigate this. I had a lot of emails in my inbox, some of which are extremely important. I tried the restore feature which was no good - all it did was restore emails that I had recently deleted, not ones that have just disappeared of their own accord!