Windows 10: What happens when a Scammer Gets access to a private laptop?

I made a big mistake. I should know better but as I get older my thinking slows just wait, you may see what it's like one day. I got a screenshot saying my laptop was locked, I panicked and called the #. I trusted them when he said he was with Microsoft and then he gained access to my laptop and ran what he said was Scanning for Errors. I became suspicious about 70% through the process and killed the connection. What is at risk and what can I do to fix this?They were sold bold that they called 1/2 hour later to ask if they could reconnect. I removed a program they installed called UltraV

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LAPTOP is not accessible ..... Access is denied.

I am trying to share a folder on a LAPTOP. I have other a number of other systems that have folders Shared and they work fine, but with this one I get the error "LAPTOP is not accessible ..... Access is denied." when I try to access it from a different Win10 system. So I went thru the entire "How to Share Files and Folders Over a Network in Windows 10" tutorial step by step. File and Print Sharing is enabled, SMB1.0 client & server are running, and Everyone has Full Access to the Share. Still get the error. I have tried it with the Network Public and Private, with the same result. Any suggestions ? Microsoft Windows 10 Home Version 10.0.19042 Build 19042

 

LAPTOP is not accessible ..... Access is denied.

SMB 1.0 is not required for sharing between two W10 machines, only for sharing with older systems such as XP. It's unnecessary here, but having it should not cause issues either. Share permissions set to 'Everyone - Full control' is one thing, but the ntfs permissions on the folder being shared also need to be set to allow access. I always turn off Password Protected Sharing on the PC doing the sharing, leaving it on (the default) often causes 'access denied' on trying to connect to the share. Turn On or Off Password Protected Sharing in Windows 10

 

Private network security

I recently did a clean install of 19042 on an old laptop to clean out years of leftover garbage, but getting it tied back into my private home network was a problem. Only 1 of the other 4 systems on the network could access drives on the laptop. I consistently got the "You do not have permission to access..." popup on the remaining 3. The laptop could access drives on all the others. Adding "Everyone" to security lists on the laptop drives solved the problem. I had been relying just on "Authenticated Users" for network access, but had no idea how to make the laptop "see" other computers on the network as authenticated. Are there any hidden risks in using Everyone on a private network with no public discovery and no passwords? Only Read & execute, List folder contents and Read are allowed.