I wonder why the machine sometimes pops up a health mall page.

1. The Health Mall is not carried by QQ, and Tencent has already expressed its position.

Or www.ip 138.com, go to its website, find out its ip, and do the above operations.

5. How to protect the computer from virus harassment?

First of all, after reinstalling the system, please don't use XP patches to collect it casually. After testing the patch set provided by a website, the FLASH plug-in contains viruses.

Secondly, after ensuring the system is clean, please use anti-virus software+firewall to protect the computer and learn to operate skillfully.

References:

Anti-virus alliance

References:

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