开机桌面无法显示（黑屏）或只显示出一个我的文档窗口的解决方法

现象：若是中病毒后，开机桌面无法显示（黑屏）或只显示出一个我的文档文件夹（当前用户）窗口

解决方法（针对XP/Vista OS）：修改注册表winlogon的键值 Shell项值为：Explorer.exe  （原始默认值）

以下为XP 系统中HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon 下（但不包括它下面分支结点(文件)键值项）的各主键值项：

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
"AutoRestartShell"=dword:00000001
"DefaultDomainName"="CHINA"
"DefaultUserName"="lkf37141"
"LegalNoticeCaption"=""
"LegalNoticeText"=""
"PowerdownAfterShutdown"="0"
"ReportBootOk"="1"
"Shell"="Explorer.exe"
"ShutdownWithoutLogon"="0"
"System"=""
"Userinit"="C:\\WINDOWS\\system32\\userinit.exe,"
"VmApplet"="rundll32 shell32,Control_RunDLL \"sysdm.cpl\""
"SfcQuota"=dword:ffffffff
"PreloadFontFile"="simsun"
"allocatecdroms"="0"
"allocatedasd"="0"
"allocatefloppies"="0"
"cachedlogonscount"="10"
"forceunlocklogon"=dword:00000000
"passwordexpirywarning"=dword:0000000f
"scremoveoption"="0"
"AllowMultipleTSSessions"=dword:00000000
"UIHost"=hex(2):6c,00,6f,00,67,00,6f,00,6e,00,75,00,69,00,2e,00,65,00,78,00,65,\
  00,00,00
"LogonType"=dword:00000000
"DebugServerCommand"="no"
"SFCDisable"=dword:00000000
"WinStationsDisabled"="0"
"HibernationPreviouslyEnabled"=dword:00000001
"ShowLogonOptions"=dword:00000001
"AltDefaultUserName"="lkf37141"
"AltDefaultDomainName"="CHINA"
"DisableCAD"=dword:00000000
"DCacheUpdate"=hex:b5,d5,a0,0a,e2,e1,cb,01
"AutoAdminLogon"="0"
"CachePrimaryDomain"="CHINA"