If the time of your computer is 10 minutes slow, you can change the time manually by opening the system clock and by setting the time to 10 minutes. You can also have your computer synchronize automatically with an official Internet Time Server so that it always shows the correct time.
Click the time of the notification bar in the bottom right corner of the screen to change your computer time. Select “Change the date and time…” Change the date and time, set the settings to the proper time, and then “OK” to save your modification.
To have your computer sync its time on an Internet time server periodically, click the time in the notification bar, select “Change Date and Zeit Settings…” and then select “Internet time” Choose “Change Settings…” and enter the official time server address. Type “pool.ntp.org,” for instance, and choose “OK” to sync your computer’s time automatically with a time server near your country.