I don't know if this is possible on Adobe Reader DC on Windows, but asking in case someone has managed to do it.
When I am working on a large document in LaTeX (I use TexStudio) I sometimes like to keep a second copy of my PDF on a second screen so that I can easily refer to what I wrote before, while on my main screen I would have TexStudio with its preview window, which is typically automatically in sync with my current editing location.
On Ubuntu (which uses evince as its default PDF viewer) I used to do it quite nicely. It also seems to watch the PDF file for updates, and keeps in sync of any new versions of the PDF file and reloads it (staying on the same page) when I re-run pdflatex from TexStudio.
At the moment I am working on a Windows machine, and I am trying to recreate the same workflow. I would really like to open a second viewer on my second screen so that I can navigate easily to previous chapters without losing my current position in TexStudio's preview window (which will anyway go back to the current editing location when I run pdflatex).
The only problem however is that when I open the PDF in Adobe Reader DC to put it on the second screen and then I try to recompile the PDF I get the error "I can't write to file". I presume that for some stupid reason Adobe Reader DC maintains some write lock on the file, probably keeping it open while the PDF is visible on screen.
Is there a way to disable this stupid file-locking behaviour from Adobe Reader DC?
UPDATE
After some valuable comments, a workaround is possible using a different viewer. One could either use SumatraPDF or evince (the default PDF viewer on Ubuntu, but also available for Windows). They are not so feature rich, and maybe do not look so nice, but in this case do the job.
A similar question was posted here for reference.
Best Answer
Been a few months since I asked this question, so I figured would be good to give it closure, for anyone facing the same problem.
The best solution I found is to install SumatraPDF. It is very lightweight and brings back the long lost user experience of opening a PDF almost instantly (I can't recall when Adobe's PDF Viewer last was so fast... maybe in version 4!)
Yes it is slightly uglier looking, with a weird menu button and frameless tabs, but I just care about the PDF I am reading. It also supports viewing two pages at once (book view) and continuous scrolling, just like Adobe PDF viewer. SumatraPDF doesn't have that annoying side-bar Adobe PDF shows with useless tools no one ever uses, that takes seconds to load and there is no evident way how to switch it off by default.
All in all a positive experience, and I am glad I had this problem and discovered SumatraPDF... now my default PDF reader.