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How do I fix Mozilla Firefox if Internet Explorer pops up, saying my PC is infected?

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When I click on Mozilla Firefox (Safe Mode), Internet Explorer Emergency Mode comes up saying that my PC is infected with malicious software and browse couldn't be launched.

When I click on Mozilla Firefox (Safe Mode), Internet Explorer Emergency Mode comes up saying that my PC is infected with malicious software and browse couldn't be launched.

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Have you run a full scan with your anti-virus program?