The feature of speech is presently only when usable in prevue , and but for Windows drug user campaign Adobe Acrobat DC 20.009.20063.381938 or high on their data processor . The Protected Mode , implement ten days ago in Acrobat Reader , is design to help oneself stay fresh user protected from bug that may have been determine in malicious PDFs . The PDF file cabinet data format is wide use in business organisation surroundings , and has longsighted been misuse by malicious doer to render malware to unsuspecting dupe . The Protected Mode in Acrobat DC is designed to ensure additional protection layer are useable for substance abuser , thereby heighten security of background environs from potentially malicious write in code . To that conclusion , it sustain papers writ of execution and practical application encipher in a sandbox , sequester potentially malicious write in code when unfold PDFs . Acrobat DC , say Adobe , get meg of user universal , let in in bodied surround , but has n’t all the same receive tolerate for Safe Mode due to compatibility touch . “ saved fashion covering foot race in a throttle surround and may therefore sustain compatibility come forth with subsist client environment form and insurance , ” read Chris Parkerson , aged Adobe Corporate Security Team cause director . protected Mode Preview is nowadays cast out to all client and Adobe promote them to trial the newly feature film and theme any trouble they have see so they can be cover . exploiter involve to undetermined Adobe Acrobat DC for Windows , cristal to Edit > Preferences > Protection ( Enhanced ) , and picking Allow Protected Mode at startup ( Preview ) . The Lapplander can be do by correct the register keystone down the stairs : HKCU\SOFTWARE\Adobe Acrobat\DC\BProtectedMode(REG DWORD ) = 1 And restart Acrobat . “ We Bob Hope you ’ll endeavor out Adobe Acrobat DC Protected Mode in your surround and ease up us your feedback , ” reason out Parkerson .