Diagnosing a Corrupt Windows Registry (or “Release The Hounds!”)

Windows registry corruption can be difficult to detect. So how do know when it becomes corrupt? The direct source of the corruption could be any one of a number of different issues or a combination of them. Sources of registry corruption may characterize themselves through PC errors, slow performance, program freezing, or system crashes.

First you could start by checking the Windows event log. Review the System or Application logs for anything with an Error or Warning status. For the most part, entries in these two logs should be informational. For any errors/warnings, make note of the particular entry. In addition, if the error occurs more than once, make note of the frequency of the error as well as the times they occur. If they occur during system startup, that can definitely narrow your focus area. Look at the details of the error. If the source of the error is not apparent, and you don't feel comfortable diving deep into the annals of the operating system, then you may need to consult a professional.

Next, check any other log files that might be generated from the software that you use. Doing a file search for "*.log" might generate some results worth looking at. Again make note of any errors keeping in mind the frequency and time.

Windows contains an internal tool called the System Configuration Utility (aka Msconfig), which is used for troubleshooting startup issues. Using this utility you can disable certain programs/services during system startup. Temporarily disabling these processes can, through process of elimination, help determine the source of the error. From the Start menu, click Run… and enter "msconfig" then click okay. From here you can selectively disable services or other processes that during startup. Optionally, you can select "Diagnostic startup" from the General tab. This will effectively disable all non-essential services not required for startup. After restarting your computer, try to reproduce the error. If the error or behaviour does not occur, chances are it may be caused by one of the programs or services that run during startup. Now (using Msconfig) try re-enabling each service or program one at a time until you can reproduce the error. Once you've found the offending software, contact you're vendor to see if there's a fix or updated version that fixes your error.

If disabling startup programs or services didn't work, try running your computer in Safe mode (F8 on your keyboard while your computer is booting). Safe mode is an option that allows your computer to boot without third-party drivers (software that tells the operating system how to access the hardware) that are used to run your video display, internet connection, etc. This is about as basic as it gets. If you're error is still occurring, then it's likely that you have some registry corruption with your basic Windows settings. If the error is not reproducible, it is possible that it's being caused by a faulty driver. You could try uninstalling each driver one a time (rebooting after each try), until the error is resolved. Once the error has stopped occurring, then you've found the culprit. Once again, contact your vendor (or check they're website for updated versions).

If you've made it this far and you still haven't found the source of your errors, then chances are, that you won't be able to find it through conventional troubleshooting. Various registry scanning software is available that can make troubleshooting far easier (and faster). Most scanners can diagnose and repair your computer within seconds. However, not all registry scanners are created equal.

Assuming you were able to find the source of the error, how do you fix it? Well, it depends. If it's not a problem with the software itself, then it's likely due to your PC's configuration. That being the case, you'll need to open up the Windows registry (but before you do that, be sure to make a full backup of your PC, or a registry backup at the very least). To open the registry, click Start - Run… and enter "regedit" and click OK. Inside the registry, you'll see the keys listed on the left pane and the name-value pairs (that hold the information) on the right. The layout is similar to the Explorer view when looking at your computer folders. As you navigate through the registry, to some the organization of the keys may become obvious. The most important areas to focus on would be HKEY_CURRENT_USERSoftware and HKEY_LOCAL_MACHINESOFTWARE as this is where the majority of installed software maintains it's settings.

Look for the key relating to the particular piece of software that's causing issues. Review the subkeys and values for anything that might look out of place. Some common problems to look for are folder names that no longer exist or software/hardware references that are no longer installed.

For more information, please visit our website to learn how to diagnose and fix windows registry errors.

Tyler Durden has been working in the computer industry for over 20 years. He enjoys writing about various Windows and other computer related topics that others might find useful.