you have Office 2013 working slow, with lag. You can do this:
1. First open any Office 2013 program. For example open Word 2013. It'll open in new Start Screen mode. Click on "Blank document" option.
2. Now click on "File" menu present in the ribbon and then click on "Options" link given at the end of the left-sidebar.
3. It'll open Options window. Click on "Advanced" tab and scroll down a little. Look for the following option in "Display" section:
Disable hardware graphics acceleration