If you’re currently using Office 2010, you might be ready to start using Office 2013. To use it, you’ll need to be running Windows 7 or Windows 8. Vista and XP are not supported with the new office suite.
Note: For this article, I’m installing the 32-bit version of Office 365 Home Premium Preview on Windows 7 Ultimate. I currently have Office 2010 Pro 32-bit installed on my system.

First, download the Office 2013 installer for the 32 or 64-bit version, the choice is yours.

After the Click to Run file is downloaded, start the install by running it as Administrator.

The first part of the Office 2013 install kicks off.

If you’re running it on Windows 8, it’s going to connect to the Microsoft account you’re signed in with.

For Windows 7, you’ll need to sign in manually. You can use which ever @live, @msn, @live or @outlook account you want, but remember, with all of the new software and technology coming this year from Microsoft, its integrating everything into a seamless experience.
If you use a lot of Microsoft products and surfaces, I recommend using one account. This makes it much easier to keep your documents, SkyDrive, Music, email and Xbox together under one account.

Then work through the simple Office 2013 install wizard.

When it’s done, you’ll have both versions of Microsoft Office installed on your system. This is nice so you can test and try out the Office 2013 Preview and still have your familiar 2010 standing by too.

One thing to note is Office 2013 takes over your office 2010 docs by default. You’ll see the new Office icon set on all of your files. Of course if you don’t like the new Office suite of programs, you can easily uninstall them
.

So what if you want to upgrade Office 2010 because you don’t want two instances of Office on your workstation?
Just uninstall Office 2010 after.
In previous Office versions, the new Outlook always uninstalled the old version (i.e. impossible to have both versions available). Can you confirm that both will co-exist happily??
Hello, yesterday I installed the Office 2013 Professional Plus with the Microsoft Home Use Program, it downloaded a 500k file and installed perfectly, can I uninstall my previous version (2010)? I tried looking at the office 2013 size in the Uninstall menu but size doesn’t appear, does this means it’s using the 2010 files as core? thanks!
You can uninstall 2010 without losing any of your documents. You can uninstall it via Programs and Features in Control Panel.
I’m having programs getting office 2013 to run even after install. Should I unistall my office 2010 and then unistall office 2013 and then reboot and reinstall office 2013 . will it all work again ?