Is my Microsoft Office 32-bit or 64-bit version?

How to find if your Microsoft Office is 32-bit or 64-bit version?
How do I know if my Office is 32-bit or 64-bit?

Open an Office app e.g. Word.
Click on "File", than “Account” and “About Word”
See the first row.

Microsoft Outlook 2013 error message "Cannot open the Outlook window. The set of folders cannot be opened. The information store could not be opened"

Check Outlook compatibility mode:
Open: C/Program Files/Microsoft Office/Office 15/Outlook.exe.
64 bit system: C:/Program Files x86/Microsoft Office/Office 15/Outlook.exe.
Right click on Outlook.exe and click on Properties and then click on Compatibility tab.
Check if you have any check mark in any of the compatibility mode options.
Make sure you also click on the option "change settings for all users" tab at the bottom of the same screen and look for similar check boxes in the window.
If you see any check boxes in the compatibility mode options, uncheck all the boxes.
Apply
OK.
Try to open Outlook and check the result.

Source and other solutions: answers.microsoft.com

Outlook 2010 error message: " invalid XML the view cannot be loaded "

Search programs and files
Type:

Outlook /resetnavpane

Enter

Source: Microsoft

E-mail messages stuck in Outbox: Outlook 2010 / 2013 vs. Norton Internet Security

Regular solutions for "messages stuck in Outbox" problem at Microsoft:
How to troubleshoot e-mail messages that are stuck in your Outbox

But if you use a complex antivirus software, e.g. Norton Internet Security, turn off scanning of outgoing messages:
Settings
Network
Message Protection

Choose the 32-bit or 64-bit version of Office

The 32-bit version of Office 2010 is the recommended option for most people, because it prevents potential compatibility issues with other 32-bit applications, specifically third-party add-ins that are available only for 32-bit operating systems.

Applies to:  Office 2010 | Office 2013 | Office 365 ProPlus

Source:
office.microsoft.com
technet.microsoft.com

Error message when you try to send or to receive email in Outlook 2010 or Outlook 2013: 0x8004010F: Outlook data file cannot be accessed.

Error message when you try to send or to receive email in Outlook 2010 or Outlook 2013:
"0x8004010F: Outlook data file cannot be accessed"

Set up again the profile with correct settings.
Set as default.
You must delete demaged profile (email account, e.g.: IMAP).
After that, emails from "Outbox" folder will be sent out automatically.

Source: Microsoft

If "Recover earlier versions of a file in Office 2010" doesn't work as it should be, and you lose your doc file...

If your Word or Excel document is demaged.
If  "Recover earlier versions of a file in Office 2010" and "Turn on AutoRecover and AutoSave to protect your files in case of a crash" don't work as they should be, you can find the "lost" document at current user's home directory in: AppData\Roaming\Microsoft\Word\ as a .tmp file.  



After finding it just rename the file extension to .doc or .docx or .xls, .xlsx, etc.