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I know that seeing repeated CAPTCHAs or "unusual activity" messages can feel alarming, and I fully respect the caution you have regarding your security.
However, just taking from my personal experience, what you are seeing is sometimes a standard website-side behavior. Ones like Walmart (shopping sites) often increase human-verification checks if the incoming traffic from a specific IP address appears unusual. This is frequently a result of internet service providers assigning shared or recently flagged IP addresses, and it can happen even when your device is completely secure.
Since your antivirus and anti-malware scans have come back clean, with you having already cleared your cookies and history, the evidence strongly suggests the issue lies with the network or the website's security filters rather than your laptop (especially if only the Walmart site shows the verification prompt). A few steps you might find helpful:
- Restart your router: This can often prompt your provider to refresh your IP address.
- Wait it out: These flags usually clear automatically over time.
- Test another device: Try accessing the site from your phone (using cellular data) to see if the behavior persists. This can help confirm that your laptop is functioning correctly.
The unusual activities might have been detected from the scripts of the sites or your internet. Your proactive approach to security is excellent, and it appears your system is indeed well-protected.
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