The registry cannot be edited in Windows 7.

After Windows 7 upgraded ie9, it found that the default IE homepage was maliciously modified.

I thought the problem was not big. I searched for the Registry and found the Registry HKEY_USERS \.... The start page of \ Software \ Microsoft \ Internet Explorer \ main is modified. If you change it to about: blank, an error is returned, indicating that you are not authorized to edit the page.

The final solution is as follows:

Run c: \ windows \ regedit.exe as an administrator, right-click it to view the permissions of main, and find that the user name is everyone and only has the read permission. Click "advanced" to view the owner. The following option is to replace the owner of the sub-container and object. Select this option, click OK, return to everyone's permission settings, and then select full control. The modification is successful and no permission restrictions are imposed.

What I don't understand is that IE is 9.0, And the homepage is still so easy to modify. No wonder there are fewer and fewer people using IE. The Windows registry mechanism is really spam. It can be played with win7 all the time, and it also suffers from common Windows users.