How likely is it that my computer was tampered with?

Tags:
Hacking
Security
With the type of work I'm in I often find myself working with the disadvantaged and homeless and late yesterday a situation arose whereby two young men needed assistance with their internet banking and circumstances dictated we use my personal computer as opposed to an office one. I watched all of their activity, ensured they never left the banking page. Afterward I pulled what information I could from one of their records and they had been charged with crimes relating to personal data theft and I've found my computer to lag since and my laptop was showing as being connected to my work or home network but also an unidentified public network. I disabled and re-enabled the Wi-Fi on my computer and it went away but had been consistent over multiple networks until then. Under what circumstances does this "unidentified network" normally appear and if there's a risk to my computer what should my next steps be?
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  • ToddN2000
    Why was the office computer not available? I personally would not let anyone use my personal computer other than my wife but that is besides the point. What banking site did they go to? Was it a major bank or an unknown bank or credit union? It may have been a fake site they set up and it installed some virus or malware when they clicked a link. Run an anti virus program ASAP. If you feel like you may have been compromised and have access to a clean PC, change all you passwords. Better to be safe than sorry.
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  • Kevin Beaver
    I'm with ToddN2000. It certainly could have been a malicious website that they went to where a malware infection could've taken place behind the scenes. You'll definitely want to run malware scans using multiple tools. You might consider HitmanPro and Webroot...You get what you pay for.
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  • carlosdl
    I agree with Todd too.

    I would recommend to take a radical step and completely format the machine and reinstall the OS (after making backup of your files).

    Meanwhile, change your passwords using another computer, and don't do anything that requires entering usernames/passwords or any other type of credentials on this one.
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