Win7 cannot use the key combination Ctrl+Alt+Del to bring up the task manager

Repair method:
1, first enter the taskmgr.exe command in the Win7 run dialog box, open the task manager.

2, check if the taskmgr.exe program in Win7 system is damaged. It is recommended to hold down the Win+R key to bring up the Run dialog box and enter the CMD command to open the DOS panel. Enter C:WindowsSystem32>dir task*.* in the DOS panel to check if the taskmgr.exe.manifes file exists and delete the file to solve the problem that the task manager cannot be opened.

Then restart the computer, enter the Win7 desktop, and then try to use the combination of Ctrl+Alt+Del or Ctrl+Alt+Esc to see, I believe Win7 task manager can easily call up again. Have friends who have encountered the same problem and quickly follow the above steps to fix it.