Brian, Thanks for the quick reply. This is a vanilla install, with literally nothing on it other that Windows 11. In particular, no third-party anti-virus tools have been installed. I had already tried adding a WD exclusion for C:\cygwin, and turning off Real-time protection and related switches.
Any other ideas? This is a Parallels VM, but I’ve used CYGWIN on all my other Parallels VMs for 15 years in a very high usage development environment with no problems. > On Oct 17, 2025, at 1:25 PM, Brian Inglis via Cygwin <[email protected]> > wrote: > > On 2025-10-17 09:23, J. P. Abelanet via Cygwin wrote: >> When I perform a fresh install of CYGWIN 3.6.5 on a fresh install of Windows >> 11 24H2 Build 26100, >> I get the following errors, which prevent even basic functionality from >> working: >> Package: 0/Perpetual >> 0p_000_autorebase.dash exit code -1073741819 >> 0p_update-info-dir.dash exit code -1073741819 >> Package: _/base-files >> base-files-mketc.sh exit code -1073741819 >> base-files-profile.sh exit code -1073741819 >> Package: _/ca-certificates >> ca-certificates.sh exit code 139 >> Package: _/libsasl2_3 >> libsasl2_3.sh exit code -1073741819 >> Package: _/rsnapshot >> rsnapshot.sh exit code 139 >> Package: z/Perpetual >> zp_fontconfig_dtd.dash exit code -1073741819 >> I’ve also tried upgrading an existing, working Windows 11 machine which had >> CYGWIN 3.5, >> and I get the exact same problems. >> I’ve used CYGWIN in production environments for years on various versions of >> Windows >> up through Windows 10 with no problems. >> Is this a known issue, and does anyone have any suggestions? > > Check AV settings, or Windows Defender/Windows Security/Virus and threat > protection settings; add exclusions? > > -- > Take care. Thanks, Brian Inglis Calgary, Alberta, Canada > > La perfection est atteinte Perfection is achieved > non pas lorsqu'il n'y a plus rien à ajouter not when there is no more to add > mais lorsqu'il n'y a plus rien à retrancher but when there is no more to cut > -- Antoine de Saint-Exupéry > > -- > Problem reports: https://cygwin.com/problems.html > FAQ: https://cygwin.com/faq/ > Documentation: https://cygwin.com/docs.html > Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
