First double-click the gray border to see if you can recover. If not, enter: "Gpedit.msc" in run to open the Group Policy Editor and locate the user Settings Management template system Ctrl+alt+del option. Double-click Delete Task Manager on the right side of the page, open the Delete Task Manager property settings page, and remember not to check "enabled" and check "Not Configured" or "disabled".
1, point start----run-----input regedit OK, open the registry to, HKEY local machinesoftwaremicrosoftwindows ntcurrentversionimage File Execution Options ...,
Put the virus in the Image File Execution Options set up in the Task Manager Taskmgr.exe right click it to select "Delete", and then you can open Task Manager (pro-Test success)
2, first use the administrator-level account login system, and then in the Start menu "Run" enter "gpedit.msc" Open the Group Policy Editor. Locate the user settings → admin templates → system →ctrl+alt+del option in the Group Policy Editor. Double-click Delete Task Manager on the right side of the page shown to open the Delete Task Manager property settings page. Select "Disabled" on the page and click "OK" to resume using "Ctrl+alt+del" to open Task Manager. (Parental test unresolved)
3. In Windows 2000/xp/2003, click start → run, enter "Gpedit.msc", and then return to open Group Policy. then expand User Configuration → administrative Templates → system, double-click the right window to block access to the Registry Editing tool, select Disabled in the pop-up window, OK, and then quit Group Policy to unlock the registry. The registry has been successfully unlocked!