Earlier today, we let you know about the availability of Microsoft Office 2013 on MSDN and TechNet. Windows users who have a TechNet or MSDN subscription can now download the newest version of Office without waiting for the general availability.

Users who are using Microsoft Office 2010 on Windows 7 or Windows 8 can either install Office 2013 alongside Office 2010 installation or upgrade to Office 2013. If you like the new Office and want to upgrade to Office 2013, simply follow the given below instructions.

Please note that Office 2013 can only be installed on Windows 7 and Windows 8 operating systems. Office 2013 isn’t compatible with Windows XP and Vista. Also, note that you can’t upgrade from 64-bit to 32-bit and vice versa. That is, if you have installed Office 2010 64-bit on your computer, you need to use only the 64-bit setup of Office 2013 to upgrade.

NOTE: Upgrading to Office 2013 will automatically remove Office 2010 from your PC.

Upgrade to Office 2013 from Office 2010

Step 1: Download your copy of Office 2013 ISO file. Yes, Office 2013 setup file comes in an ISO file, and you need to mount the ISO to run the setup. If you are on Windows 8, right-click on the file and click open with Windows Explorer to mount it (see how to mount ISO file in Windows 8). And if you’re on Windows 7, follow our how to mount ISO file in Windows 7 guide.

Step 2: Double-click on the Setup file and click Yes for the UAC prompt.

Step 3: Accept the license agreement, click the Continue button.

Step 4: In the following screen, click Upgrade button to automatically remove existing Office installation and install the newest version of Office. You are done! Enjoy your Microsoft Office 2013!

When you run Office 2013 for the first time, you will be asked to activate the program. Follow the instructions provided in our how to activate Office 2013 guide to activate your copy of Office.

Please note the setup only removes the earlier version of Office program, and it doesn’t delete your data and settings. But if the edition of Office you are installing doesn’t include some of the programs that were part of your earlier version of Office, those earlier programs might not be removed automatically. You need to uninstall them manually.