Step 3: You may also place the computer in a clean boot state and install the program.
a) Click Start, type “msconfig.exe” (without quotes) in the Start Search box, and then press Enter to start the System Configuration Utility.
b) On the General tab, click Selective Startup, and then click to clear the Load startup items check box. (The Use Original Boot.ini check box is unavailable.)
c) On the Services tab, click to select the Hide all Microsoft services check box, and then click Disable all. Click OK, and then click Restart.
Note: Make sure you put the computer back to Normal Startup once troubleshooting is completed.