Windows Black Screen of Death: What you need to know

Microsoft's latest security updates appear to have crippled some Windows users. Here are five things you should know.

Any Windows owner is familiar with the Blue Screen of Death, that much-dreaded white text on a blue background that essentially says you're through. But what you may not know is that there's a new contender in town: The Black Screen of Death. So what is this horrible-sounding thing, where did it come from, what's being done to fix it, and how bad is it? Here are five things you need to know about the Black Screen of Death.

It stems from Microsoft security updates

After the latest Microsoft patch was delivered on Tuesday, November 10, 2009, users began reporting a crippling black screen. The Black Screen of Death causes your PC to seize up and removes everything except, in some cases, a single open My Computer window. So what happened?

Microsoft apparently made changes to the Access Control List (ACL), a list of permissions for a logged-on user. The ACL interacts with registry keys, creating visible desktop features such as a sidebar. However, the latest patches appear to make some changes to those registry keys. The effect is that some installed applications aren't aware of the changes and don't run properly.

It's not Windows 7-specific

Windows 7 haters: step back. The Black Screen of Death isn't relegated to Microsoft's latest OS. Security firm Previx states that the Black Screen of Death can affect Windows XP, Vista, and Windows 7 without prejudice. So if you're considering uninstalling Windows 7, fearful that it is the source of the problem, don't bother. You won't dodge any bullet.

Microsoft is investigating

Gotta give it to Microsoft: It has a clever way of neither confirming nor denying the existence of a PC illness. In an e-mail statement obtained by PC World yesterday, a company spokesman wrote: "Microsoft is investigating reports that its latest release of security updates is resulting in system issues for some customers. Once we complete our investigation, we will provide detailed guidance on how to prevent or address these issues."

So does it exist or not? Yes it does. But Microsoft won't say for absolutely positively certain until it has finished investigating. That's when they broadly release a fix for the issue and maybe, if we're lucky, apologize for the inconvenience.

Security firm Prevx has a fix

Prevx, a UK security company that first discovered the issue, released both step-by-step instructions and a download to eliminate the Black Screen of Death. For those who like (and are capable of) popping open the hood of their PC, you can also modify registry settings, though this doesn't come recommended if you're unfamiliar with the guts of a Windows machine.

Not as bad as Blue Screen of Death

So how powerful is this beast? Does it compare to the Blue Screen of Death? Nope — they are entirely different problems. The Blue Screen of Death represents a hardware or driver failure, meaning something is wrong deep within the computer. The Black Screen of Death has relatively easy fixes and doesn't necessarily mean there is something physically wrong with your equipment.

By now some of you may be sick to death of problems stemming from Microsoft and want a clean slate. Here's how to wipe your PC clean and start from scratch. It may not necessarily be the solution to your problem, or problems, but it can be a gush of therapeutic refreshment to eliminate (most) everything that's wrong with your computer.

Stay tuned to catch Microsoft's official fix as soon as it is released.

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Brennon Slattery

PC World (US online)
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