Step 1 - Go to Start
Step 2 - Click on Run
Step 3 - Type in msconfig
Step 4 - Hit Enter or OK
Step 5 - On the System Configuration Window , Click start up tab.
Step 6 - Check / Uncheck startup items and click Ok.
http://techsharepoint.blogspot.com/2012/12/windows-7-access-denied-error.html