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Qazzafi Ashraf , IT Network Manager , Oxford University Press, Pakistan
1. The legacy Windows7 Backup program, which allows you to capture an image backup of your system, is gone. The associated executable file and DLL (Sdclt.exe and Sdcpl.dll, respectively) are gone, as is the Windows Backup service. The opportunity to restore a backup created using that tool is still there, but you can’t create a new image backup of your device running the Windows8.1 Preview.2. If you go to the System Properties dialog box, you’ll find that the Windows Experience Index is no longer displayed, and there appears to be no way to make it appear. You can still run any of the individual Windows System Assessment tests (Winsat.exe, with its many switches) and view the saved results. But there's no easy way to see the composite numbers.3. The Messaging app, which lives alongside Mail, People and Calendar in the Windows8 unified communications suite, is not present in Windows8.1. Its absence probably reflects Microsoft’s decision to deprecate its messaging clients in favor of Skype.4. The Windows8.1 Preview version of the Photos app gets new editing functions, but it no longer allows you to browse images from SkyDrive.5. In Windows8, you had to download and run a Windows utility to synchronize SkyDrive files with your local PC. In Windows8.1, this SkyDrive sync capability is built into the operating system.
