The computer system time can not be modified how to solve

In fact, the system time can not be modified for many reasons, then come together to see what causes the system time can not be modified, here also gives the corresponding solution, I hope that Everyone is useful. How to solve the system time can not be modified, in fact, there are many reasons why the system time can not be modified. We must patiently check the cause one by one, and know the root cause that can not be modified after the system time can be solved. Let's take a look at the reasons why the system time cannot be modified, and the corresponding computer learning solution is given. The system time cannot be modified. First, the motherboard battery (cmos) has no power. Second, there are viruses (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). Third, you do not have the right to modify the time. 1. How to judge whether the CMOS battery is dead. After booting, enter bios, modify the time, save and exit, turn off the computer to restart, and then enter cmos to view. If the time is run according to the modification, the battery is OK. Otherwise, you need to replace the battery. If you still can't replace it after replacing the battery, it may be a problem with the motherboard. 2. How to judge is a virus. (Because of vista users, you need to turn off uac to use the proofreading control of this station. So the time modification mentioned here starts with the method of setting the time manually.) Some computers can be modified in windows time, but it is very fast after modification. Jump to a wrong time, this situation is a virus. If the time can be modified, but the time is not correct after the restart. Then you can start the computer after the time is modified, and enter the bios. If the time is wrong, it means that the motherboard battery is dead. If the time is right, the time is wrong after entering the window, indicating that it is a virus. If the time cannot be changed, for example, the time control of this site does not work, it may be that the virus may or may not have permission. Therefore, you need to determine whether the user you are currently logged in has permission to modify the time. 3, check the time to modify the permissions: first figure out your windows user name, if you do not know then press ctrl + alt + del three keys to view. 1. Click Start —— Run Enter secpol.msc and click OK. (Or “Control Panel & Rarr; Management Tools & Rarr; Local Security Policy ) 2. Then there will be a "Local Security Policy" management dialog box, click inside the tree box on the left --> local Policy--> User Rights Assignment 3. Find and double-click "Change System Time" in the list on the right to bring up a window. (If the operation can not be completed, indicating that you do not have administrative rights, log in again with administrator) Lists the list of authorized users. If you find that there is no user name, you have no permission. If you already have your username, you have permission, but if the time still can't be modified, it means it is a virus. Ok, if it is a situation without permission, then modify the time 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! Windows xp: Cancel permissions: select users from the list, click delete, then click OK to add permissions: Click “ Add users or groups & rdquo;, then click Advanced, select users from the list, confirm the selection, then click OK to close. Windows 2000: Cancel User: Click the checkbox for Cancel Local Policy Settings and then OK. Add permissions: Click the Add (A)... button to bring up a window, select the user to add permissions from the list, double-click or click the Add button, then confirm the close, and then OK. Restart the computer. Whether you are canceling permissions or adding permissions, you will need to restart your computer. If you have cancelled the modification rights of all users, then at the time of startup, enter bios to manually set the time. Then start windows, the virus can not modify the time. After the antivirus is clean in the future, add the time modification permission. If you can go online, use the automatic adjustment of computer time.

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