RE: Great Plains Journal Entry only takes up half the screen for me user. Other users have it working as it should

This is a new error though.  

You can just clear the Windows Temp folder from the Internet Options window in Internet Explorer.  

For the Metrics part, either disable it from the Homepage or install Office Web Components.  Are you using MS Office 64bit?

For the initial issue, try to play through with your screen resolution and it should work afterwards.