This is what is shown when I click on desktop:
DESKTOP
Installation Information
Product Name: ArcGIS 10.1 for Desktop
Release Version: 10.1
Product Version: 10.1.0.3035
Installation Folder: C:\Program Files (x86)\ArcGIS\Desktop10.1\
Installed By: Thomas
Install Date: 9/11/2015
Install Time: 13:08:58
Install Image: C:\Users\Thomas\Documents\ArcGIS 10.1\Desktop\
Current User: Thomas
Application Data Folder: C:\Users\Thomas\AppData\Roaming
System Temporary Folder: C:\Users\Thomas\AppData\Local\Temp\
Service Pack Information
ArcGIS Service Pack: 0 (build 0)
ArcGIS Service Pack Installer: N/A
ArcGIS Service Pack Install Date: N/A
ArcGIS Service Pack Install Time: N/A
ArcGIS Service Pack Status: N/A
License Manager Environment Variable Information
ARCGIS_LICENSE_FILE: N/A
LM_LICENSE_FILE: N/A