I have an HP Pavilion laptop with Windows 8.1 .  I want to temporarily turn off/disable Mcafee in the system tray while I install Nero 2015 Classic.  I did not see the options for this, so I searched Google.  The results say "double click the icon, then click Advanced tab".
There is not an Advanced tab on my home screen for Mcafee Antivirus Plus.  The options I have are Navigation, Manage Security, and the status of the various services of the software, such as Virus and Spyware PROTECTION.  I checked Mcafee support site with no better results.  The forum search only here does not work.  How do I turn off/disable it temporarily?

Thanks
Should be under Manage Security...if not try rite cliking the icon and it should have a disable option...First of all,Ido not have the answer. Instead I have questions.
Is there some ISSUE with your current system?
Why would you need to add or change anything?
Have RUM ae a full backup for yur system recently?

If you an not happy with Mcafee Antivirus Plus, you should um-install it completely before changing over to anointer AV. Yo udo not want two AV systems running at the same time.

Here is an article bout how to um-install Mcafee.
http://www.wikihow.com/Uninstall-McAfee-Antivirus-Plus-2012
My suggestion is to makes sure you have a full backup at this point.
If something goes wrong, you can recovery  and get back to where you were.
Thanks for your responses.  The options I have when I click on Manage Security are:

virus and spyware protection - real time scanning is on
web and email protection - firewall is on
data protection
mcafee updates - updates are current
your subscription is active
PC and Home Network Tools
Security Report


I am not having trouble with the software.  I don't want to change anything with it.   I am not unhappy with it.  I do not want to uninstall it.  I want to temporarily disable it while I install software, which is a normal procedure.
What happened with right clik ? ?Here is a wiki that looks like what you want.
The idea is to only disable, but not remove the program for a short time.
http://www.wikihow.com/Disable-McAfee
Quote

McAfee keeps your computer safe from virus infections, but sometimes you may need to disable it in order to install a program, or perform some other advanced task on the computer. You can quickly disable McAfee from its System Tray menu, but what if you need to uninstall it completely? This is where THINGS get a little tricky. See Step 1 below to learn how to disable or uninstall any McAfee product.

2
Double-click the McAfee icon in the System Tray. This is located in the lower-right corner of the desktop. The icon looks like an "M" in a red shield. If you don't see the icon, click the arrow button at the edge of the System Tray to expand the Tray and display all the icons.

Generally the error code 23 issue is caused by the installer.  Please try to download the installer again, and check the MD5 checksum and deactivate the Antivirus during the installation process.