A.PerformaWindowsAnytimeUpgrade.
B.DownloadandruntheWindows7UpgradeAdvisor.
C.InserttheWindows7installationmedia.FromtheInstallWindowsdialogbox,selecttheUpgradeoption.
D.StartthecomputerfromtheWindows7installationmedia.FromtheInstallWindowsdialogbox,selecttheUpgradeoption.
参考答案:A