A Step-By-Step Guide to Restore Not New PC Efficiency After Installing Antivirus


The Registry Editor presents a graphical, Explorer-like view of the Registry. The left-hand pane contains a collapsible tree view of the key hierarchy. When a key is selected in the left hand pane, the right hand pane displays the values it contains and any sub-keys. We shall use the Registry Editor as our principal exploration tool in the course of this article. Things go wrong, and the only way to fix them may be to make manual changes to the Registry.

Modify Values & Data In A
Registry Key

So for Windows NT and Windows 95 Microsoft introduced the Registry. You can think of the Registry as a database for storing and accessing configuration data. Like all good databases the Registry can store different types of data. Data is stored in a hierarchical manner rather like the folders on a hard disk.

Inspect some of these keys and you’ll see that they have a default value containing a name. For example, the “.txt” key normally has a default name of “txtfile”.

This name is called a “ProgID” and it links to a key of that name containing the associated actions for that file type. Also stored here is information about software components installed in the computer. Windows supports an object-based architecture that allows software components to be used by any application.

Registry data that is currently in use is cached in memory to provide better performance. This system worked pretty well, and is still used by some Windows programs, but it turned out to have a few disadvantages. INI files were slow to access and limited in size to 64Kb. There was also just one INI file per program per computer, making it difficult to have different settings for each user of a computer.

  • It contains the key path followed by the value name optionally followed by data.
  • For many, making a System Restore point is the most convenient backup method.
  • If data size is nonzero, the record is a value write operation; otherwise it is a value delete operation.
  • I also use the export facility of Regedit to make a copy of the nwnp32.dll is missing Registry key that I am working on.
  • The ironclad rule of Registry editing is that you must first back up the Registry.
  • For registry key write and delete operations, the key path is at offset 72.

Fortunately, Microsoft has provided a tool specifically designed for the purpose. Its filename is REGEDIT.EXE under Windows 9x and REGEDT32.EXE under Windows NT. If you’re confident of your ability not to wreck the entire Registry you can save time by creating a backup of just the branch you’re about to change. To do this, select the key whose contents you want to back up in the left-hand pane of the Registry Editor and choose Export Registry File from the Registry menu. This will create a copy of the contents of the branch as a REG file.

What Is Windows Registry? [Minitool Wiki]

For example, when you install an application that allows TIFF image files to be viewed, information linking this file type (with a .TIF extension) with this application will be stored here. How the Registry is stored is of little interest, except for backup purposes. It is more useful to understand the logical view of it as seen by Windows and by applications, and as presented to you by the Registry Editor. In the remainder of this article we will explain what you can see and what use you might make of this information.

Backup, Add, Modify And Delete
Registry Keys And Values

This technology has evolved since it was introduced in Windows 3 and has been known as Object Linking and Embedding (OLE), ActiveX and Component Object Model (COM). Components installed on the computer are registered in the Registry so that other programs know they are there and are able to make use of them. An example of this is Internet Explorer, whose browser component can be used by any program that needs to display web pages or other HTML-formatted data. Among the software-related data stored in this branch is information about file types and the actions (Open, Print and so on) that can be performed on them.