1, the general situation may be the user did not hold the F8 in time to create a safe mode, we can reproduce the boot, several times in a row F8, so that entered into safe mode.
2. If you start Safe Mode blue screen, the condition of the crash, may be the computer system is damaged by virus Trojan, in the computer can also start normally, enter into the computer system, and then open the registry (click on the task bar start-run, on the run input regedit press ENTER can enter), Then open hkey_local_machinesystemcurrentcontrolsetcontrolsafeboot in turn. Found in the above item subkey all deleted, this will cause the computer Safe mode can not start, the solution is from the normal another computer on the corresponding key value branch export as a. reg file, and then import the failed computer.
3, if the above methods are not feasible, then use Jinshan poison PA antivirus software to the computer to kill the repair script, as shown in the picture can be repaired Safe mode does not go to the fault.