单项选择题
A.critical updates
B.software updates
C.driver updates
D.virus definition updates
单项选择题 AuserwhoisrunningWindowsXPProfessionalreportsthatthecomputermonitorstoppedfunctioningfollowinganinstallationofanupdateddriverforthevideocardandthatattemptstodeleteandre-installtheoriginaldriverhavenotcorrectedthesituation.WhichofthefollowingactionswouldbeBESTtocorrectthissituation？（）
单项选择题 Atechnicianissearchingaknowledgebaseforthecorrectmethodofremovingavirus.Theknowledgebasestatesthatthekey：HKEY_LOCAL_MACHINE\MICROSOFT\SOFTWARE\CURRENTVERSION\PAKneedstobedeleted.Whichofthefollowingshouldthetechnicianusetodeletethekey？（）
单项选择题 Whichofthefollowingcommandsallowsnavigationofthepathsbetweendirectories？（）