Question about Outlook Express

I had windows 10 downloaded and had not problems but I recently started getting messages thatsay Microsoft has found a error and will have to restart pc so when it came up I could not see my emails went in and it shows  pop for server instead of pop3, I also got a error message ox800ccc0o

I would like to know if it is possible to change my Windows Live Mail email address without having to go to each individual online account I have to update the old email address to the new email address.

The last time I changed my Windows Live Mail email address I had to go through a small 'Rolodex' of online accounts and change all of them individually to the new email address.

"There was an error when attempting to connect to the Windows Live Calendar service. If the error persists, check to see if there's an upgrade of Windows Live Mail available or contact a service representative."

   This message opens every single time I open mail. There doesn't appear to be any solution anywhere that works. Anybody know how to stop this? It's annoying and frustrating that there's no answer to the problem. And yes, I've uninstalled/reinstalled and tried un-checking mail boxes on left side of page...thanks.

"There was an error when attempting to connect to the Windows Live Calendar service. If the error persists, check to see if there's an upgrade of Windows Live Mail available or contact a service representative."

   This message opens every single time I open mail. There doesn't appear to be any solution anywhere that works. Anybody know how to stop this? It's annoying and frustrating that there's no answer to the problem. And yes, I've uninstalled/reinstalled and tried un-checking mail boxes on left side of page...thanks.

[Original subject: windows live mail]

For the past several days I've been unable to download my email messages in WLM 2012. Following is the error message I get:

Have had this problem for several months. WLM 2012 will not open. Wheel just keeps spinning and have to close the program via Task Manager to get rid of it. Have tried Windows Essentials repair and uninstall and reinstallation but no success. I am using Windows 7.

To add a new account, I am entering the email address (*** Email address is removed for privacy ***) and the associated password for that account. But it won't accept it. But curiously, it asks for the ISP password, but the router password isn't accepted, either. I can receive email from the other account, but can't reply to that email; the client operation fails. Not sure what password to use from the ISP.

Original title: ISP Password