On re-reading that article, it may not apply to your version of Windows, so go Start - type %temp% and press enter when it comes up.
Press CTRL a to highlight then CTRL d to delete.
This file can become highly populated and can have an adverse effect on performance, such as slowing the machine down.
I use the free version of CCleaner after each session to clean out temp files.
https://www.ccleaner.com/ccleanerYou need to add this to the items to be cleaned by going into the program and click on Options then uncheck the box for Only delete files in Windows Temp folders older than 24hrs.