How can I check whether my computer is compromised?
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MellowPine47
I downloaded a file from WhatsApp onto my computer and extracted the archive. The extracted item appeared to be an image, but I never opened it. In File Explorer, it appeared like a CD or mounted drive, and Windows initially said it was in use when I tried to delete it. I ejected the mounted drive and then deleted the downloaded file. What should I check to make sure my computer is still safe?
Answers
Run a full system scan with a reputable antivirus program. Windows Defender is generally a good first choice and can perform a complete scan of the computer, including files that a quick scan might miss.
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If you are worried that malware might send the same file to your WhatsApp contacts, check your recent chats and sent-message activity for anything you did not send. However, a file being downloaded and mounted does not automatically mean your account or computer was compromised. Run a full scan and change your account password if you notice suspicious activity.
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The CD-like appearance was likely a mounted disk image rather than proof that the computer was infected. Ejecting it and deleting the original file was sensible, but a full Windows Defender scan is still recommended for reassurance. Also install pending Windows updates and avoid opening unexpected files in the future.
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MellowPine47: Could Windows Defender detect something like this, or should I install another antivirus program?