There's nothing that does not work correctly while following the video. At that time, I also downloaded MikTex 2.9 and set it up. After then, I deleted all of them, and set up TeXLive and LyX. Why I chose TeXLive is because I'm used to TeXLive, rather than MikTex.
After typing "where pdflatex," the command prompt shows: C:\texlive\2017\bin\win32\pdflatex.exe where the installation program of LyX chose as a path to latex.exe. Best regards, Jiwoong Jang ________________________________ 보낸 사람: Joel Kulesza <jkule...@gmail.com> 보낸 날짜: 2019년 4월 3일 수요일 오후 1:45 받는 사람: 장지웅(수학과) 참조: mailing lyx 제목: Re: LyX installation problems on Windows 10. On Tue, Apr 2, 2019 at 10:28 PM 장지웅(수학과) <wldnd1...@postech.ac.kr<mailto:wldnd1...@postech.ac.kr>> wrote: Dear Mr. Kulesza, Yes, here is a link: https://www.youtube.com/watch?v=kALm051M0iA&t=179s I think the video suggests a really basic procedure. Best regards, jiwoong Jang Jiwoong, Please be sure to CC the mailing list so others are able to help also. Yes, that video does show a very basic procedure. It seems quite normal. Is there anything that did not work correctly for you while following it? If you have deleted both MikTeX and TeXLive and LyX, have you tried following the installation procedures again? After you install MikTeX or TeXLive, open a Command Prompt (Start Menu -> cmd.exe) and type `where pdflatex`. What does it show? Thanks, Joel