Why did autocomplete stop working in browsers?

Question

Google Chrome

Autocomplete in browsers just stopped working, all the relevant settings are enabled (the Yandex browser was installed from scratch, it didn’t exist before). We tried to check this situation in another Windows profile, the same problem. In the properties of the browser in the content section, they did the cleaning, it didn’t help ... where to look and what could be the trouble?

Answer 1

Remember when the problem appeared and what preceded it (for example: installed software, used cliner-like programs, shut down the PC incorrectly).