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I don't know if it is the right place to ask this question but I am in a desperate situation. If this is not the place please let me know where I can get advice.
I was going to download something and a message saying that I should call Microsoft and that if I don't, the computer would get blocked within 5 minutes came up. So I called them and they remotely accessed my computer and installed some antivirus software and the problem was resolved. But, then when I checked online for this issue it seems like a scam as several posts such as this were there and here (when I called them I didn't have access to internet, so I couldn't check their legitimacy and most of all I panicked). They installed F-secure anti virus and included Adguard Adblocker, Malwarebytes and AdBlock Plus and some network guard (That's what I know that they did). But, since this was like a scam, I already canceled my bank card.
And they provide me service for one year and I am concerned now whether they can access my computer from today onward. What should I do? Should I tell them I don't want their one year plan and try and get rid of them?
Is there a way that I can know if they have installed anything on my computer that they can get details of what's happening in my computer. I now realise what I did was utterly stupid, but hen that message came up I panicked and called them. I have back up copy of windows. Should I reset the PC? Should I change the email passwords? If I keep away from making any online payments from this laptop would I be safe? Should I take this laptop to an expert?
I would extremely value your suggestions as I am scared as to what dangerous outcomes can happen