Hello. I've been using Opera for several years now. Neither windows 7 nor opera were reinstalled. Opera was installed by the default browser. After the automatic update to version 82.0.4227.23 64-bit, opera ceased to be the default browser. There is no way to fix it. I tried both through IE and through Chrome, they are set by default browsers, Opera cannot take away their rights. It is started from the administrator. There is no Opera in the list of programs by default in Windows.