I don’t know whether I am posting it in a right section or not. I am currently using a Windows computer. Yesterday I have got a call from call centre saying that they are part of my ISP and providing help to speed up the computer. I have downloaded the teamviewer and gave them the password assuming that they were genuine. They first connected my computer remotely and went into Start> Run>prefetch. There were several files and they informed me that these files could be potential virus's and they can clear them for £100/9year. I actually didn’t need it. So I said thanks and disconnected the remote access (teamviewer connection).
Now I have doubt that whether they have re-opened the connection and planted some malicious program inside my computer. I ran the Avira scan and a malwarebytes but both find nothing. So I am not sure whether they have planted anything on my computer or not. Do you think that I am safe?
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