(AP) -- Microsoft Corp. says Windows 7, the next version of its computer operating software, will go on sale Oct. 22.
Windows 7, which replaces the much-complained-about Windows Vista, will be available on new PCs. Microsoft, the world's largest software maker, will also sell versions that people can install on existing PCs.
Upgrades will be free for people who buy a new Windows Vista computer shortly before Windows 7 arrives, though Microsoft did not say when the upgrade program begins. Microsoft also didn't say how much Windows 7 will cost.
The availability of Windows 7 in time for the holidays could boost PC sales, which have slowed in the recession.
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