If you are receiving Access Denied Error Messages then you may want to head over to the Microsoft Support Solution Center for Access Denied Error Messages
Where you can get support and help on this problem whether you are seeing it on your PC, network or over the internet.
As well as easy access t our top solutions on this topic:
How do I open a file if I get an access denied message? Get brief answers to questions about how to solve common permission or encryption problems when accessing files or folders.
How to change security settings for a folder when you do not have permissions to its subfolders or files Describes an "Access is denied" error that occurs when you change permissions on a folder when you do not have access permission to its subfolders or files.
The "GetTempFileName" function fails together with an access denied error Fixes an "Access to the path is denied" error that occurs when the "GetTempFileName" function tries to create a temporary file name in Windows 7 or in Windows Server 2008 R2.
How to troubleshoot definition update issues for Windows Defender Describes how to troubleshoot the "Windows Defender Definitions haven't been updated" error message.
Common file and registry virtualization issues in Windows Vista or in Windows 7 Describes how to troubleshoot "access denied" error messages after you install an application in a folder other than the %programfiles% folder.
How to troubleshoot Volume Activation error codes on Windows 7, Windows Server 2008 and Windows Vista-based computers How to troubleshoot error codes when you try to use a Multiple Activation Key (MAK) or the Key Management Service (KMS) to perform Volume Activation on one or more Windows 7 or Windows Vista-based computers.
get more help for “Access denied” error messages
thanks for this excellent tips, I face this access denied eror msg lot many times
try this .. windows 8 comes with default admin account, which can be activated through steps given in the link.