How to solve the problem of not being able to modify the system time

How to solve the problem that the system time cannot be modified

Let’s take a look at the reasons why the system time cannot be modified, and also give the corresponding solutions.

Reasons why the system time cannot be modified: 1. The motherboard battery (cmos) is out of power,

2. There are viruses (these viruses modify the system time to make anti-virus software ineffective, or cause some software to fail to run properly, such as securities trading software).

3. You do not have the permission to modify the time. 1. How to determine whether the cmos battery is dead. After startup, enter bios, modify the time, save and exit, turn off the computer and restart, then enter cmos to check. If the time runs as modified, it means the battery is OK. Otherwise, the battery needs to be replaced. If it still doesn't work after replacing the battery, there may be a problem with the motherboard. 2. How to determine if it is a virus. (Vista users need to turn off UAC to use the proofing control of this site. Therefore, the time modification mentioned here must be done manually.) Some computers can modify the time under Windows, but it will be very fast after modification. Jumping to a wrong time, this situation is a virus. If the time can be modified, but the time is incorrect after restarting. Then after changing the time, you can start the computer and enter the bios. If the time is wrong at this time, it means the motherboard battery is dead. If the time is right at this time, but the time is wrong after entering Windows, it means it is a virus. If the time cannot be changed, for example, the time adjustment control on this site cannot function, it may be a virus or lack of permission. So you need to determine whether the user you are currently logged in has the permission to modify the time. 3. Check the time modification permission: first find out your windows user name. If you don’t know it, press the three keys ctrl alt del to check. 1. Click Start--Run, enter secpol.msc, and click OK. (Or "Control Panel→Administrative Tools→Local Security Policy")

2. Then the "Local Security Policy" management dialog box will appear. In the tree box on the left, click--Local Policy--User Rights Assignment

3. Find and double-click "Change System Time" in the list on the right, and a window will pop up. (If the operation cannot be completed, it means that you do not have administrative rights. Use administrator to log in again.) There is a list of users with permissions. If your user name is not found, it means that you did not have permissions originally. If your username already exists, it means you have permission, but if the time still cannot be modified, it means it is a virus. Well, if there is no permission, increase the permission and then modify the time. If it is determined to be a virus and there is currently no effective anti-virus method, it is recommended to cancel the time modification permissions of all users and then follow the following operations! windows xp:

Cancel permissions: Select the user from the list, click Delete, and then click OK

Add permissions: Click "Add User or Group", then click Advanced, select the user from the list, confirm the selection, and then click OK to close. windows 2000

Cancel user: Click the check box corresponding to Cancel local policy settings, and then confirm.

Add permissions: Click the Add (A)... button, a window will pop up, select the user to add permissions from the list, double-click or click the Add button, then confirm to close, and then confirm. Restart the computer. Whether you are canceling permissions or adding permissions, you need to restart the computer. If you have canceled the modification permissions of all users, enter the bios to manually set the time during startup. Just start Windows again and the virus will not be able to modify the time. In the future, after the virus is clean, the time modification permission will be added.

The computer time cannot be changed

If you cannot modify the time, it may be due to lack of permission or a virus. For time viruses, the emergency method is to cancel the time modification permissions of all users so that the virus does not have permission to modify the time, and then restart the computer and enter the bios to set the time.

The computer time is inaccurate, there may be several reasons: 1. The motherboard battery (cmos) is out of power, 2. There are viruses (these viruses modify the system time to make the anti-virus software ineffective, or cause some software to not run properly , such as securities trading software). 3. You do not have permission to modify the time.

1. How to determine whether the cmos battery is out of power. After startup, enter bios, modify the time, save and exit, turn off the computer and restart, then enter cmos to check. If the time runs as modified, it means the battery is OK. Otherwise, the battery needs to be replaced. If it still doesn't work after replacing the battery, there may be a problem with the motherboard.

2. How to determine if it is a virus.

(Due to Vista users, uac needs to be turned off to use the proofreading control of this site. Therefore, the time modification mentioned here must be done by manually setting the time)

The time of some computers can be modified under Windows, but it quickly jumps to the wrong time after modification. This situation is a virus.

If the time can be modified, but the time is incorrect after restarting. Then after changing the time, you can start the computer and enter the bios. If the time is wrong at this time, it means the motherboard battery is dead. If the time is right at this time, but the time is wrong after entering Windows, it means it is a virus.

If the time cannot be changed, for example, the time synchronization control on this site cannot function, it may be a virus or lack of permission. So you need to determine whether the user you are currently logged in has the permission to modify the time.

3. Check time modification permission:

First figure out your windows username. If you don’t know it, press the three keys ctrl alt del to check.

1. Click Start-->Run, enter secpol.msc, and click OK. (Or "Control Panel→Administrative Tools→Local Security Policy")

2. Then the "Local Security Policy" management dialog box will appear. In the tree box on the left, click -->Local Policy -->User Rights Assignment

3. Find and double-click "Change System Time" in the list on the right, and a window will pop up.

(If the operation cannot be completed, it means you do not have administrative rights, log in again with administrator)

There is a list of users with permissions. If your username is not found, it means you did not have permissions originally.

If your username already exists, it means you have permission, but if the time still cannot be modified, it means it is a virus.

Okay, if there is no permission, increase the permission and then modify the time. If it is determined to be a virus and there is currently no effective anti-virus method, it is recommended to cancel the time modification permissions of all users, and then read further in this article!

windows xp:

Cancel permissions: Select the user from the list, click Delete, and then click OK

Add permissions: Click "Add User or Group", then click Advanced, select the user from the list, confirm the selection, and then click OK to close.

windows 2000

Cancel user: Click the check box corresponding to Cancel local policy settings, and then confirm.

Add permissions: Click the Add (A)... button, a window will pop up, select the user to add permissions from the list, double-click or click the Add button, then confirm to close, and then confirm.

Restart the computer. Whether you are canceling permissions or adding permissions, you need to restart the computer.

If you have canceled the modification permissions of all users, enter the bios to manually set the time at startup. Just start Windows again and the virus will not be able to modify the time. In the future, after the virus is clean, the time modification permission will be added.

If the time still cannot be adjusted after adding permissions after originally not having permissions, it means there is still a virus. You can still cancel the permissions and then lock the time.

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