Generally, the motherboard in the host computer of the user will have a battery, which can supply power to the motherboard, but if the motherboard battery is out of power, the original time setting will be cleared, so the time is wrong at this time, the following is about win7 time always Wrong solution, come and see.
Win7 time is always wrong solution
1. First click the time and date on the taskbar in the lower right corner of the win7 system, then select and click "Change Date and Time Settings" in the pop-up interface, and click "Change Date and Time Settings".
2. Then, in the date and time interface that pops up, switch to the "Internet Time" tab, then click the "Change Settings" button, and click the "Change Settings" button.
3. Then select a server in the drop-down button of the server, generally select the time.windows.com option, then click the Update Now button and select time.windows.com.
4. After the update, it will display that the clock and the server are synchronized successfully, so you don't have to worry about the system time being inaccurate in the future.
