A.Restartinsafemodeandthenrollbackthevideocarddriver.
B.Restartinsafemodeandthenrevertthecomputertoapreviousrestorepoint.
C.StartthecomputerfromtheWindows7installationmedia.SelectRepairyourcomputerandthenselectSystemRestore.
D.StartthecomputerfromtheWindows7installationmedia.SelectRepairyourcomputerandthenselectSystemImageRecovery.
参考答案：A
