Hello Andrew,
Thank you for posting your concern on Microsoft Community Forum. I understand that you're having issues on opening your calendar within Windows Live Mail making you unable to sign in. I will be assisting you on your inquiry.
It is possible that the issue is caused by a corrupted data within your Windows Live Mail. For this issue, please try to repair
your Live Mail by following the steps below:
For
Windows 8:
1. Click the
Windows button on your keyboard.
2. Type
Control Panel and hit Enter.
3. Click
Programs.
4. Click
Programs and Features.
5. Search for
Windows Essentials 2012 on the list and then select it.
6. Click
Uninstall/Change.
7. Click
Repair all Windows Essentials programs.
For
Windows Vista/7:
1. Click the
Start menu.
2. Click
Control Panel.
3. Click
Programs.
4. Click
Programs and Features.
5. Search for
Windows Essentials 2012 on the list and then select it.
6. Click
Uninstall/Change.
7. Click
Repair all Windows Essentials programs.
For
Windows XP:
1. Click the
Start menu.
2. Click
Control Panel.
3. Click
Add or Remove Programs.
4. Search for
Windows Live Essentials on the list and then select it.
6. Click
Change/Remove.
7. Click
Repair, and then click Continue.
In addition, please try to reconfigure your account. This will refresh Windows Live Mail and might also fix the issue. To
do this, kindly follow the steps within this link.
In case the issue persists, please provide us more information by answering the questions below:
We're looking forward to your response.
Thank you.