Hands on: Windows XP Mode Works, but Is it Worth the Trouble?

Windows 7's much-touted XP Mode will let you run legacy apps in a virtual machine, but only if you've got the right hardware and the patience to set it up.

By Preston Gralla
Mon, May 11, 2009

Computerworld — Windows XP Mode, one of the most hyped features of Windows 7, was designed to integrate XP with Windows 7 so that you can run XP applications from directly inside Windows 7. Microsoft has touted the feature for small businesses that need to run XP applications but want to upgrade to Windows 7. Those businesses may indeed want to use it — but for many consumers, the problems with Windows XP Mode will likely outweigh its benefits.

Can your PC handle Windows XP Mode?

Here's the first piece of bad news: Your PC may not be able to handle Windows XP Mode, even if you've just bought a new machine.

XP Mode requires that your CPU be capable of hardware virtualization using either Intel Virtualization Technology (VT) for Intel chips or AMD-V for AMD chips. You might assume that if you've got a multicore PC, it can certainly do that. However, that's not necessarily the case.

Even some quad-core CPUs, such as the Intel Core 2 Quad Q8400, don't have virtualization technology built in. And to make things more confusing, some older, less powerful and less expensive CPUs, such as the Intel Core Duo T2400, do have the technology.

Both Intel and AMD have utilities you can download that will let you know if your PC has that support. You can use either the AMD Virtualization Compatibility Check Utility (which checks whether your processor supports AMD-V) or the Intel Processor Identification Utility (which is a more comprehensive checking tool).

If your processor doesn't support either technology, you can stop reading now -- you're out of luck. However, even if the CPU does support it, you're still not out of the woods.

Hardware virtualization is turned off by default on many PCs. There's no clear reason why that is, although according to Microsoft, there are potential security issues with hardware virtualization.

You'll need to check your system BIOS to find out whether your hardware virtualization is turned on; if it's not, you'll have to turn it on. How you do that varies according to system manufacturer and even model, so check with your manufacturer. (Microsoft offers sample instructions for Dell, HP and Lenovo.)

For example, on my Dell, I rebooted and pressed the F12 key as the system restarted to get into the BIOS setup. At first, I couldn't find an option for virtualization support, but after nosing around, I finally discovered it in a very odd place -- in the POST behavior area. I enabled it and let the PC boot.

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