Windows Security files cannot be opened
My computer has a Windows 7 Ultimate 64-Bit Operating System installed on it. Recently, I was trying to open a .reg file ,but I can't open the file since windows keeps on blocking it. An error from Windows Security says:
These files can't be open.
Your Internet security settings prevented one or more files from being opened.
So what I did is, I right-clicked the file I was trying to open and click on properties for the Unblock tab, but it don't have any effect at all. I temporarily disable my UAC (User Account Control) and the AVG Antivirus I am currently using. But it doesn't have an effect. I even disable my Firewall hoping to fix the error, but it doesn't help.
I booted from Safe Mode, but I can't still open the file. My default Internet browser is Internet Explorer 8. I already disabled everything for this to work ,but I really don't have an idea what is causing this problem. I also cleared all the history and cache on my browser, but I have no luck. Does anyone have an answer for this? How can I disable the security for this? Do I need to run a system restore for this to work? Please help.