System administrator has set a system policy that prohibits this installation

Today, when installing XNA with Win7, "system administrator set System Policy, prohibit this installation" appears, there are many methods on the Internet, one of which is:

Delete the Hkey_classes_root\installer\products\4080110900063d11c8ef10054038389c registry entries, but my computer doesn't have this registration at all, and all the other methods have been tried, But none of them worked.

Finally switch to win7 administrator mode, you can install, the following steps:

Control Panel \ Administrative Tools \ Local Security policy \ Local Policies \ Security options \ Account: Administrator account status

Select Enabled

Log off the current user and log in with administrator

You can install it by logging in with administrator.