Outlook was opening but wouldn't stay open and now it won't open at all? Not sure what to do.
Have no idea what version of Outlook you have, here is one way, if it is not there, put the keyword repair into your Outlook Help file. On the Help menu, click Detect and Repair. If you do not see this menu item, click the chevrons at the bottom of the menu to display the hidden menu items.
In the Detect and Repair dialog box, click Start.
Click OK, and then restart your computer.