Malware problems all seem to have .ru as part of url

Can anyone tell me how to block any network streams packets etc. that have hopped to .ru at any point blocked from accessing pic and/or router. Continual loss of sysadmin on all OS platforms, including mobile, by hijacking of built in admin account. Shortcuts deleted and new built in admin name ( very similar to original sysadmin eg. "Default" changed to "default user" ) permissions, access, changed shortly thereafter. Unable to log onto come.exe even though owner useame is still shown as admin. Net User cannot be used as that requires use by admin.

I'm using Windows examples but situation applies to OSX, iOS, android Ununtu. Changed routers, purchased static IP (IPV6 seems to be the corrupted network access. VPN, proxies circumvented and wi-fi remains on unless airplane mode . Cannot use Etheet connection in airplane mode. Help hugely appreciated.

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