How to fix access is denied Error in win 7 Download the file below unzip and open, you get access is denied on any drive, right-click on the drive and select Take Owner Ship and try again to see if you are okay, If you still have problems, read the tutorial below.

In the following article, we will show you how to fix Access Denied when accessing shared folders. on any computer using Windows 7 operating system from another Windows 7 computer in workgroup.In fact, this error often occurs when users use the Windows Vista, Windows 7, Windows Server 2008 or Windows Server 2008 R2 operating system version to access the entire shared administration folder (for example C $, D $ ...) are located on the same operating system computer, and both machines belong to workgroup (not Active Directory domain ). 
Specifically, when we log in via Windows Explorer or Run , the system will display the following error: 
Logon unsuccessful: 
Windows is unable to log you on. 
Make sure your user name and password are correct. 

When trying to connect any disk partition to a shared folder using the Net Use command structurethen it will receive the following 
System error 5 has occurred. Lỗi truy cập Access. 
Examples are as follows:

ZEUS is the computer name that is accessed

And to solve this situation, we need to do some minor Registry editing on the remote-accessible computer. Before starting, we recommend that you back up the entire Registry system of that machine in case the risk can occur at any time. 
First, start Registry Editor (Regedit.exe) via Start Menu> Run> regedit . Then, go to: 
HKEY_LOCAL_MACHINE SOFTWARE Microsoft Windows curr entVersion Policies Policies
Here, you create a new DWORD (32-bit) Value key named LocalAccountTokenFilterPolicy , then change the value in the section. Value data to 1, click OK . Close the windowRegistry again, no need to restart the computer, and our problem has been solved:

It's simple and easy, with just a few simple corrections and we've solved this complicated and often annoying problem. Good luck! 
Anh (according to Petri)