I started having the same issue tonight after restarting my computer. When Chrome is open I get this Avast popup every 15 minutes or so:

https://lh3.googleusercontent.com/j6e6GHco0aajv8eqP0iP2FSRnxNp34_bQ4wzHyGcmj37T5cgf6UhNnvOV-rQaeis5rNq_kwQRjAFQVx7w94h3qRS_EYKDN7QdTc9ure3US97uVB9yBotUff3dr-73l-OSqPGUZUJc3fp2w6gLcJpGPdLWsZcDfhlLQTaLPNTmH_BehDMP_WeFdDiuvXpSxgi6WcLi8VCf3TtZLWTSoAyMxXrYIXBJcb9v7xPmnm_o__voeC4LtCZ3Gxg5geZuCAcBtYfBcqQI4JCzkgZeU8ff_mIXZslyvCQn2ANmExa2T-NZY8pKGJ7KGFwFgliSDT6MIasZoRCYuuFpSOtXWlXbkfQmAd66DpYzlZd9F0Mm7agkYR928KpcKL1oS1T3ihykVuxE_mP7dy8ObG_pGXqwJuyMoy-iJluOslmiLqxMHqOhdZKkYQzIIfuBE6ku5z8COQgOeGMFIA_ZkSPZkxzsfOLykegjL-1e4q0FT4qeBdi9EUmMtTgQpI9jfyGK-XHbexj9OKjxBxB_VPy73hhw1qC2A--d90e8Ha_Gfm7UY5lIz_3bPzxc9BW8OObYRsBbo1X5MChxiDWziTggobdvHwStHWXxmlkvz5BU-xI_KJQdlj6zYnq=w586-h938-no

I think this seems like a false positive in the latest virus definitions update.