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#11
This looks like a file permissions problem. You should be logged in as Administrator to correct this.
Open C:\Windows, locate regedit.exe file and right click on the file and select properties.
Go to Security tab and check the administrator's rights for this program. If it is not full control, click on Advanced, go to Owner tab and change owner to Administrator. Close the dialog box and change the Administrator's rights to "Full Control". Now hopefully you should be able to change the compatibility mode from Win 95 to Win 7 and execute the program.
Or alternatively you may search on Google and download one of the free registry editors like
Registrar Registry Manager 6.52
or
O&O RegEditor
or
any other freely downloadable registry editors for window 7 and use.
Last edited by Brink; 06 Sep 2011 at 16:15. Reason: merged