Posted February 2, 201311 yr FPCH Admin I'm trying to open Windows Defender (I have Windows Vista). I get an error message: 0x80070424. When I try to download a new version, I can't. I get the "Vista already has this program" message. I'm trying to fix the slow performance of my computer hence, I want to activate Windows Defender.Help! and Thanks! View this thread Off Topic Forum - Unlike the Rest
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