Windows Activation Error 0x80070426

[OmJaa]

I’m having a Windows Vista desktop which was working fine from last 2 weeks (installed it two weeks ago). It was activated. In recent I installed Visual Studio Express Web/C#/VB. Also tried installing Service Pack 1 from Windows update but the installation got failed. Next morning when I started the computer I found that there is a message in the right bottom of the screen saying Windows is not genuine.

When I check Event Viewer Log, I found DistributedCOM error with the following description:

The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID {8BC3F05E-D86B-11D0-A075-00C04FB68820} to the user Home-PC\{USER} SID (S-1-5-21-471328347-769042369-3731885411-1000) from address LocalHost (Using LRPC). This security permission can be modified using the Component Services administrative tool.

Any help please?

[MikeY007]

Hi, just follow the below steps to fix the problem:

• Using Regedit, navigate to the following registry value
• HKCR\Clsid\clsid value\localserver32
• The clsid value is the information displayed in the message.
• In the right pane, double-click Default. The Edit String dialog box is displayed. Leave this dialog box open.
• Click Start, and then click Control Panel.
• Double-click Administrative Tools, and then double-click Component Services.
• In the Component Services snap-in, expand Computers, expand My Computer, and double-click DCOM Config.
• In the right pane, locate the program by using its friendly name.
• Right-click the program name, and then select Properties.
• On the Security tab, in the Launch and Activation Permissions group box, select Customize, and then click Edit.

Add the user to the permissions list, and give the user the appropriate permissions.