* Astronomy

Microsoft has made its Virtual PC 2004 virtualisation application free to download. There's no trial out period and no crippled demo. Users who were interested in testing out various operating systems on their Windows PC can now do so free of charge.
Microsoft says "whether Microsoft virtualisation technology is an important component of your existing infrastructure or you're just a Virtual PC enthusiast, you can now download Virtual PC 2004 Service Pack 1 absolutely free." Microsoft also mentions that the upcoming Virtual PC 2007, set to be released along with Windows Vista, will also remain fully free.

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