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It will then have created a new key at HKEY_CLASSES_ROOT\newprogid. The original actions at HKEY_CLASSES_ROOT\oldprogid may still exist. Comparing the data that can be accessed from the Folder Options dialog box with the corresponding registry entries may help gain a clearer understanding of how it all works. It’s easier and safer to use this dialog box to manage the file type associations on your system, but sometimes a problem may occur for which the Registry Editor offers the only hope of a solution.

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Suppose that you install a new application – for example, an image editor. You then find that GIF files now open in this application when you would prefer to continue using the image viewer you used before. If you are lucky, all that has happened is that the new application has created an entry at HKEY_CLASSES_ROOT\.gif specifying a new ProgID, overwriting the original entry.

Then select Registry, Export Registry File from the menu, and save the file with a name such as “gif-1”. Next, select the key named after the “.gif” ProgID, which may be “giffile”. Export this to a file named “gif-2” using the same steps. The current associations for GIF files can now be restored at any time by double-clicking these two files.

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Using the Registry Editor’s Search function, locate the key containing the command for opening GIF files using the original program. (Search for the program name as data.) The name of the key at the root of this branch may be the original ProgID. If this seems to be the case, all you need to do to restore the original actions is to edit HKEY_CLASSES_ROOT\.gif and change its default value back to the original ProgID.

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Under Windows NT/2000 the physical storage of the Registry data is very different from that used under Windows 9x. System information is kept in a number of different files, most of which are only accessible by the system administrator for security reasons. Most of these files are stored in the System32\Config folder. User information is kept in files named NTUSER.DAT, which are stored in the Profiles subfolder of the main Windows folder. To back up the Registry manually the contents of both the Config and Profiles subfolders must be backed up. It is recommended that you use NTBACKUP.EXE or some other Windows NT/2000 compatible backup program.

It contains keys named after applications, for example “Iexplore.exe”. Each key contains a default string set to the full path of the named program, and a key named Path that contains a path string.

In this case you don’t need to create a dummy new file in the Windows ShellNew folder. In the ShellNew registry key don’t create a FileName value. Create a new string value called “NullFile” instead, and leave its data as an empty string. Using the Registry Editor’s Export function you can save the current file associations for specific file types so that you can restore them if another program changes them. This is what you would do, using GIF files as an example.

  • Microsoft is by far the biggest target for viruses and malware.
  • Plus, I note now it is called Microsoft Defender because it is much more than just a malware scanner for Windows, the OS.
  • For example, the built in firewall is part of Microsoft Defender.
  • But Android is second, with just under 1% of apps installed on Android devices with Google Play Protect in the potentially harmful app, or PHA, category.

It performs much the same function as a DOS search path. When reinstalling Windows or transferring to a new computer it can be annoying that your software configuration settings are lost. Even if the Registry is backed up, it is inadvisable to restore it to a new computer since much of the information in it is system-dependent and would be inappropriate for the new machine. However, knowing where application settings are stored, it is possible using REGEDIT to export them to a .REG file from where they can be imported to the new system’s Registry. For some document types an empty document is literally an empty file.

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