The answer to this question really depends on the antivirus program that is installed on your computer. However, thankfully all antivirus protection programs can be temporarily disabled by following the below steps.

1. Locate the antivirus protection program icon on the systray. Below are some examples of what your program icon may look like. Additional examples can be found on document CHSYS. Also moving the mouse over each of the icons and will also display what each of the icons are.
2. Once the antivirus icon has been located right-click the icon and select disable, stop, or something similar. In some cases you may need to launch or open the program control center and disable the program from the menu that appears.

If following the above recommendations do not help you with disabling your antivirus scanner you can also boot into Safe Mode, which will not load any third-party programs including the antivirus program. This is helpful for times you're concerned about the antivirus program interrupting a program during an install.