Learn how you can upgrade microsoft office 2010 to 2013.
Download microsoft office and run the setup.
Step 1 :Installation files are being prepared
Step 2 : Read the microsoft software license terms and condition and proceed to next
Step 3 : Now click the upgrade option
Step 4: In Upgrade selection choose the keep all previous version and select all office apps if you wish as shown in thee below image to avoid the deletion of Office 2010 features.
Step 5: Now click install. That's it . Now you have upgraded office 2010 to 2013.