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As per the issue description mentioned above, you are facing issue when trying to open a pdf in Acrobat, is that correct?
Please try the troubleshooting steps given in the following help documents:
You may also refer to the following forum threads discussing the similar issue:
The problem is occurring when ever I try to open the file in Acrobat, now I tried going through the HKCU path, now I don't now much about that stuff, I do my best to stay away from editing anything in their.
I go as far as this HKCU\Software\Adobe\Adobe Acrobat\2017\AVGeneral\
Their was no bValidateBytesBeforeHeader, is that something I have to create myself, if so can you explain to me carefully what I have to do?
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