Why browing in firefox yesterday, the forum I was viewing suddenly re-directed to a new page claiming to be from the Canadian Government. It then popped up a window saying my PC is now locked and my files encrypted, and I needed to pay $100 to unlock the files. The browser was then locked and I had to go into task manager to close it down.
Browsing through my files, nothing has been locked/encrypted. And from what I can tell, nothing was downloaded when that webpage was opened. Avast! never popped up warning me of any suspicious activity.
Still Ransomware is a serious enough threat I didn't want to take any risks. I backed up my files to an external drive (and disconnected the drive) and then disconnected from the internet.
I posted a thread in the ransomware section here. They suggested my issue was potentially this: "All Your Files are Encrypted" Browser Virus, which pretty well fit the description of what I experienced.
I booted in safemode and ran scans with MalwareBytes, HitmanPro, and MalwareBytes Anti-Root kit. They all came back with a few hits (though I haven't scanned anything in quite a while, so that's not a huge surprise), but after cleaning everything, I rebooted and ran the scans again. Everything came back clean.
So I've re-hooked my machine online and everything seems to be fine. Still, it was suggested I open a new thread here as you'd be better off advising me if my system is actually clean.
I'm currently running Windows 10 64-bit, and have Avast! running for Anti-virus and Spyware.
Any additional steps I should take to ensure I don't have some ransomeware waiting in the background to encrypt my files?