I'm having problems with Windows 8 Activation using KMS. Whenever I run the following code in Command Prompt (It is run using Administrator i.e. 'Run as administrator') Code: slmgr.vbs -ipk <key> I get the following error Code: Error: 0x80070005 Access denied: the requested action requires elevated privileges When I run the following code Code: slmgr /skms <kms-server> There is no error But when I run the following code Code: slmgr.vbs -ato I again get the following error Code: Error: 0x80070005 Access denied: the requested action requires elevated privileges Note: All the commands are carried out in command prompt with elevated privileges (It is run using Administrator i.e. 'Run as administrator') slmgr.vbs /dlv command gives Code: Name: Windows(R), Professional edition Description: Windows(R) Operating System, VOLUME_KMSCLIENT channel Activation ID: a98bcd6d-5343-4603-8afe-5908e4611112 Application ID: 55c92734-d682-4d71-983e-d6ec3f16059f Extended PID: 05426-01787-000-000011-03-16393-9200.0000-3022012 Installation ID: 614835631171006215272003235619304345009310864853269813600055203 Partial Product Key: J8CK4 License Status: Notification Notification Reason: 0xC004F00F. Remaining Windows rearm count: 1000 Trusted time: 16-05-2013 01:58:50 PM Configured Activation Type: All Please use slmgr.vbs /ato to activate and update KMS client information in order to update values. Note: I have also scanned my system for malware and viruses. I have also carried out sfc /scannow in normal mode and safe mode I have also tried MKT and I'm getting the following Code: System.UnauthorizedAccessException at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo) at System.Runtime.InteropServices.Marshal.ThrowExceptionForHR(Int32 errorCode) at System.Management.ManagementObject.InvokeMethod(String methodName, ManagementBaseObject inParameters, InvokeMethodOptions options) at ..( , String , Boolean , String , Int32 , String , Boolean , Boolean ) at ..(String , Int32 , , Boolean , Boolean , String , Boolean ) at ..(Object , DoWorkEventArgs ) and I have installed this version of Windows 8 Code: Windows 8 (x64) English-United Kingdom 3348 MB File Name: en-gb_windows_8_x64_dvd_915412.iso SHA1: 79ED9958CF1690DD8A60A0B1B15F5DCC76C8E625 I have also activated the Super admin by Code: net user administrator /active:yes and tried out all the possible commands. Even tried out sfc /scannow with the Super Admin user in Normal as well as Safe mode. Any help would be appreciated.