One of the major access denied issues we face during automation on Win7/Win2k8 is because of UAC [ User Account Control] settings enabled on the servers.
ex: when i try to copy execute Copy Command from my automation script
Solution: Disable the UAC Control policy on the server
follow the steps:
a. Enter MSConfig [System Configuration] in the start-Run
b. Select the tools Tab on the System Configuration Window
c. Select Tool Name: Change UAC Settings and click Launch
[C:WindowsSystem32UserAccountControlSettings.exe]
d. Minimize the scroll lowest to disable the UAC.
e. Reboot the machine
You can have the following alternative to perform this :
http://technet.microsoft.com/en-us/library/cc709691(v=ws.10).aspx