Windows 10, Delphi Seattle. Trying to install JCL/JVCL. I had previously installed them, and was working fine until one day, I start getting errors on Delphi startup saying that it cannot find around 20 Jedi BPL files. After talking to a guy at Embarcadero, was told this was a known issue...in the registry getting messed up. I decided to uninstall and reinstall. I followed manual uninstall process. (Removed packages, deleted path entries, deleted BPL files. Did NOT make any manual changes to registry). Rebooted. Delphi now starts up properly; no indication of missing files. When trying to reinstall, I run install.bat for JCL first. This is the version that I previously had working. I get a cmd window saying "Launching JCL Installer, then immediately get a small window popup for JediInstaller.exe saying "The application was unable to start correctly(0xc00000c3). Click OK to close the application." I tried isntalling latest version from Github. Had to also download jedi.inc and kylix.inc, but after doing that, I still get same error.
Thinking this was a permission problem, I run cmd as Admin... No good. I try to do an install from GetIt Package manager. It downloads, extracts, launches installer, and then I immediately get the same error.
Note: I still have all the JVCL folders in my Delphi palette, but there are no components in the folders.
Any and all help appreciated.