Microsoft has now resolved an issue with many Windows 8 PCs that were not able to run the Windows 8.1 preview, but the Fujitsu ARROWS Tab series of tablets is still unable to run the upgrade.
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Windows 10 ISOs now available to download
Poll: Is Windows 10 ready for its launch?
Hands-on: Phone Continuum in Windows 10 Mobile
windows 10 phone continuum
Hands-on: Windows Hello biometric log-in