Like BitMaxz said... your computer is likely to be infected with malware. If i was you i would even just format and reinstall a fresh OS.

Looking into the address transaction history: https://blockchair.com/bitcoin/address/13gwPnRgJjqsg2T1QQ6LQXtxWJAQDJWD6z
It seems to have been in use for more than 2 years old... which implies whichever malware is using it is most like to have been in existence for a while now and has scammed lots of people and is still scamming