The 0xE000078B (Server Timeout) error code means OneNote is having trouble communicating with the web server where your notebook is stored. Most likely, there’s been a server timeout, which occurs when the server is busy and can’t respond to your requests.
1. Conflicts with antivirus and firewall
Check if your Antivirus program is blocking any of the programs that are getting installed on your computer. It is always suggested to disable your antivirus before you install any program in your computer.
2. Temporary files and Temporary internet files:
There might be temporary files and temporary internet files and the junk files in your computer which will cause the registry issues and make some services not responsive. These temporary files might cause trouble for the system programs.
It is important for you to optimize and tune up your computer.
3. Reset Internet Explorer settings
There could be a problem with your web browser which may cause this kind of issue.
The temporary Internet files and the Browsing Cache ,tools bar, add-ons and the other internet souces might cause the problem for you to perform the online installation.Stop the print spooler
4. Remove older versions of Office
There could be old office versions running on your computer. It is required for you to uninstall and remove the old office versions before installing the latest Office 2013 or office 365.
5. Start Internet Explorer without add-ons
initiating the installation without addons may help you sometimes.
6. Run system file checker: sfc /scannow
To resolve some of the system file issues, it is required to run the system file checker
7. Turn off hardware acceleration
In computing, hardware acceleration is the use of computer hardware to perform some functions faster than is possible in software running on the general-purpose CPU. Examples of hardware acceleration include blitting acceleration functionality in graphics processing units (GPUs) and instructions for complex operations in CPUs.Reset the Task Scheduler.
It is better to disable Hardware acceleration incase if it’s enabled
8. Try a hardwired connection
If your Internet is running on Wifi connection, try changing it to hardwired connection because the wireless connection is always slower than a wired connection.
9. Create a new Windows Admin profile (Windows 7 only)
Check if you are having admin privileges on your Windows Operating system.