Microsoft Security Essentials (MSE) is a free security suite that is becoming more and more popular. It can be installed on Windows XP, Windows Vista, and Windows 7.  X-Rite Applications has detected some instrument detection issues when a customer has MSE running on their computer.  As with most other anti-virus/firewall vendors, simply setting an exclusion or program permission for the X-Rite program will correct the issue.  For MSE, use the following instructions:

1. Disconnect the X-Rite measurement device (i1Display, ColorMunki, i1Pro, etc…)
2. Open MSE by going to Windows “Start” > “All Programs” > “Microsoft Security Essentials”
3. Select the “Settings” tab and then click on “Excluded files and locations” on the left panel
4. Click on “Browse” on the right side of the window and then navigate to (C:) > Program Files (or “Program Files (x86)” in 64-bit OS) > X-Rite
5. Click on the “X-Rite” folder to highlight it and then select “OK”
6. Select “Add” on the right side of the window and then “Save Changes” at the bottom of the window
7. Close MSE and restart the computer
8. Connect your X-Rite device after restarting and load the driver automatically if prompted.  Open the appropriate X-Rite program and test.