The perfect solution for the notebook win7 system time can not be changed

Analysis of the reasons why the system time cannot be modified:

First, the motherboard battery (cmos) is dead.

Second, there is no permission to modify the time

Third, the computer exists Virus (the purpose of such virus modification time is to make anti-virus software useless, or cause some software to run abnormally, such as securities stock software)

Solution:

1. Determine whether cmos The battery is dead, first enter the bios interface after starting the laptop, then modify the time, save and exit, turn off the computer to restart, then enter cmos to view, if the time is run according to the modification, it means the battery is no problem, otherwise you need to replace the battery If it still doesn't work after replacing the good battery, it may be a problem with the motherboard.

2, to determine whether it is a virus, some computers can be modified in windows time, but after the modification, it quickly jumps to a wrong time, this situation is a virus, if the time can be modified, but re After the start time is not right, then you can start the computer after the time modification, enter the bios to see, if this time is wrong, it means that the motherboard battery is dead, if this time is right, the time is wrong after entering windows It is a virus.

3, check whether there is time to modify the permissions, first figure out the windows user name of their computer, if you do not know, press ctrl + alt + del three keys to view.

1) First click Start & mdash; Run, enter secpol.msc in the Run dialog box, then press Enter;

2) In the pop-up "Local Security Policy" window , expand to "local policy --> user rights assignments";

3) then find and double-click "Change system time" in the list on the right, a window pops up (if the operation Can not complete, indicating that you do not have administrative privileges, log in again with administrator), which lists the list of users with permissions, if you find that there is no user name, then you have no permissions, if you already have your username, you Have permission, but if the time still can't be modified, it means it is a virus.

4) If it is a situation without permission, increase the permission and then modify the time. If it is judged to be a virus and there is no effective anti-virus method at present, it is recommended to cancel the time modification permission of all users, and then follow the steps below!

Cancel the permission: select the user from the list, click delete, then click OK .

Add permission: Click “Add user or group”, then click Advanced, select user from the list, confirm the selection, and then click OK to close.