To help you effectively:

I notice you've switched between Russian ("rav antivirus скачать" – meaning "download rav antivirus") and an English instruction to "develop a post."

RAV (Romanian Antivirus) is an older antivirus engine (originally from GeCAD, later acquired by Microsoft). It is no longer actively developed or maintained as a standalone consumer product. I do not recommend downloading it from third-party sites, as old/unmaintained antivirus software provides little protection and could be repackaged with malware. Instead, consider modern, trusted free antivirus options like Bitdefender Free, Kaspersky Free, or Microsoft Defender (built into Windows).