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Intruder on PC?

I have a win10 pc that was hacked, we had it cleaned and all the malwarebytes and norton scans show clean but we are having strange things like, programs being stopped (malwarebytes, norton, and system mechanic) outlook rules being setup to reroute the inbox to RSS feeds, etc. Is there any way I can tell if there is something that is letting someone obtain unauthorized access to the pc?

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WORKS2011

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Kesavan Jeganarayanan

The Office 365 account might been compromised.
When an account is compromised RSS Feed is a common location as people rarely think to look in that folder when trying to find out where their messages are.

Please refer this links:

https://docs.microsoft.com/en-us/office365/troubleshoot/security/determine-account-is-compromised
https://blogs.technet.microsoft.com/office365security/how-to-fix-a-compromised-hacked-microsoft-office-365-account/

WORKS2011

Anything regarding Office 365 change the password immediately. Also confirm an additional admin user wasn't created in the Office 365 portal.

John Tsioumpris

If you got "hacked" .....there is always a good chance that the "hacker" has some good " code" that's is probably invisible to most security measures.
If this is the case don't hesitate...just clean format your system and you would be good to go.
Getting "hacked" is a bit hard.. you must be somewhat high profile individual... probably you got a virus/malware that probably installed a backdoor for remote control

Lee W, MVP

Malicious people are always trying to find ways around protection software. For the protection software to be effective, they have to 100% certain they are stopping the bad guys and there's just no way to do that. If you're not 99.9% certain the machine is clean, then wipe it and reload it. If you're REALLY paranoid, replace it.

THEN change all your passwords.