adobe reader is not opening. it says cannot load core dll. now adobe flash player will not install
"cannot load core DLL" indicates that you have a rootkit infection. Clean it up and it should work again.
Regarding Flash Player you need to provide more information: operating system, web browser, what means "will not install"?
For Adobe Reader:
Please follow this KB doc: http://helpx.adobe.com/acrobat/kb/reader-core-dll-error.html
For Flash Player: http://forums.adobe.com/community/flashplayer
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