Note the impact of server system date on Anti-Virus Software

Today, the customer called to say that the server's anti-virus software didn't work, so he immediately set out where the customer was. After studying the anti-virus software on the server, I did not know why for a long time. Later I found that the system date was not the current date, but was pushed back for many years. Because all anti-virus software has a validity period, it does not work after the validity period is exceeded, so the correct time is changed and the anti-virus software works properly. Restart the server and check that the date has changed again. You can determine whether the battery of the server is dead, or whether the battery of the server (not a common PC) is dead because there is no new battery on the hand, so a battery was removed from the old PC and everything went back to normal.