What it is
What you may notice
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New apps or browser extensions you didn’t choose
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Homepage/search engine changed, extra ads or redirects
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Startup gets slower - background updaters and tasks appear
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Security tools warn about PUPs or unwanted changes
How it gets in
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Bundled installers from download portals and “free” repacks
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Fake update prompts and deceptive setup wizards with pre-checked offers
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“Next, next, finish” installs without custom options
Remove it now - quick steps
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Uninstall unfamiliar programs and browser add-ons.
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Run a full anti-malware scan, reboot, then scan again.
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Reset browser homepage/search and clear cache; remove leftover tasks/services.
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From a clean device, change passwords if you installed anything highly suspicious.
Prevent it
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Download from official sites - avoid mirrors and repacks.
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During install, pick Custom/Advanced and uncheck extras.
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Keep Windows, browsers, and security tools updated.
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Consider DNS/web filtering to block known bad hosts.