opinion to save my pc

[cafter]

In my country it's monsoon, and
i think my motherboard got water or humid air because of the monsoon season,
in previous year in monsoon my motherboard was faulty because of humidity or water in motherboard and this monsoon also i am facing this type of issue like changing time automatically, usb error without inserting any usb(because of waterdrops in usd port maybe)

please give your opinion to save my pc from humid air and water.