Mathcad Express pim_installmgr_mathcad.exe dissappears I entered registration data to obtain a download link, received the link, and downloaded the installer. When I run the installer, it starts unpacking, but at the end of the unpacking process, the installer simply closes, and that's it.I tried extracting the installer and looking for the files mentioned on forum, but the only executable file in the installer is setup.exe.I also followed the advice from: https://www.ptc.com/en/support/article/cs200121?_gl=1*1vpgx6s*_gcl_au*MTU0MDU5NTUzNy4xNzUwMDU1NTA3*_ga*NjYzMzMxOTgzLjE3NTAwNTU1MDQ.*_ga_7NMP2MSYPM*czE3NTAwNTU1MDUkbzEkZzEkdDE3NTAwNTk4MDEkajYkbDAkaDA.