Microsoft is expected to update PCs running the Windows 7 beta this week.
On the Windows Blog, Windows 7 manager Brandon LeBlanc said the firm would be releasing up to five test updates from tomorrow (24 February).
He said, "These will allow us to test and verify our ability to deliver and mange the updating of Windows 7."
The updates will not deliver new features or fix bugs, and will only "replace system files with the same version of the file currently on the system".
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Users will need to manually install the updates through Windows Update, said LeBlanc.
At the same, Microsoft is expected to soon start distributing the Release Candidate build of Service Pack 2 for Windows Vista and Windows Server 2008 to its select group of testers.