Since its introduction, the Windows Registry has been a source of agony and confusion for Windows users around the world. The registry also happens to be the prime location for a lot of very important functions, so it’s not going away anytime soon.

Yes You Can, But Should You?

Can you … should you… edit the registry in Windows Vista? Yes, you can edit the registry, but whether or not you should depends on a number of things, including your level of understanding about what’s in the registry and what effects your changes will have on the way your computer operates.

For support personnel, editing the registry is a relatively common event. Most IT professionals prefer to edit the registry directly. You can edit the registry indirectly, though – often with the help of a wizard or graphical user interface (GUI). The changes you make in a control panel setting, for example, get written into the registry based on what boxes you fill out or check in a configuration panel. That seems like a relatively painless way to edit the registry, and in fact, it is.

If you’ve never seen the registry before, you probably shouldn’t edit it unless you’re following some very specific directions. Understand that the Registry (in any version of Windows) is operational. There is no “undo” unless you had the forethought to make a backup before you started editing! Regedit will not ask if you’re sure you want Windows to accept your changes. It also won’t check your changes to see if they make sense, will work or will have a negative effect on something else.

The changes you make to the registry are instant, as is the damage if you happen to make a mistake. My cardinal rules for editing the registry, therefore, are:

1. Don’t edit the registry if you do not fully understand what you’re doing. Instead of attacking the registry, learn about it and look at it (without making changes) to familiarize yourself with it.

2. Don’t edit the registry without having first made a backup of it. As long as you’re backing things up, back up the system state too!

3. Don’t edit the registry without knowing how to get back into it to fix a mistake. This includes being able to swap in your backup file if it comes to that.

If you do encounter serious trouble that prevents the computer from booting normally, you may be able to revive your computer by using the Last Known Good state. Try this option first but don’t assume that this will save you in all circumstances.

Photo Credit: Jeff The Trojan, via Flickr