Why does the name of my TEMP directory keep changing?

A customer liaison contacted the shell team with the following request:Subject: Support case: 069314718055994On two of my customer's machines, he's finding that if he opens %TEMP% from the Start menu, it opens C:\Users\username\AppData\Local\Temp\1, C:\Users\username\AppData\Local\Temp\2, and so on. Each time the user logs off and back on, the number increments. The number resets after each