End of Windows 7 64bits support?

cosas · February 9, 2026, 9:42pm

Hi

In the past years we had an announcement about the end of support for Win XP (v1.1.0).

I found V2 won’t start on Win 7 x64. Do we have the same info for this OS so we can pick the latest available working binary from the github assets?

Thank you

bt90 · February 9, 2026, 10:31pm

github.com/syncthing/syncthing

v1.27.1 crashes on Windows 7 and Windows Server 2008

opened 12:20AM - 12 Dec 23 UTC

closed 01:14AM - 12 Dec 23 UTC

vector090

bug frozen-due-to-age needs-triage

### Does your log mention database corruption? Not sure. ### Include requi…red information - which version of Syncthing and what operating system you are using 1.27.1 Windows Fresh downloaded, and files are intact. - what happened, D:\syncthing-windows-amd64-v1.27.1>syncthing.exe --version Exception 0xc0000005 0x8 0x0 0x0 PC=0x0 runtime.asmstdcall() runtime/sys_windows_amd64.s:65 +0x75 fp=0x22fca0 sp=0x22fc80 pc=0x473dd5 rax 0x0 rbx 0x1a27f20 rcx 0x1a88240 rdi 0x7fffffde000 rsi 0x22fea0 rbp 0x22fde0 rsp 0x22fc78 r8 0x0 r9 0x22fee0 r10 0x1a59a38 r11 0x21 r12 0x22fec0 r13 0x1 r14 0x1a27480 r15 0x0 rip 0x0 rflags 0x10293 cs 0x33 fs 0x53 gs 0x2b - what you expected to happen instead, and - any steps to reproduce the problem. Old version works, till syncthing auto upgrades to 1.27.1. D:\syncthing-windows-amd64-v1.27.0\syncthing-windows-amd64-v1.27.0>syncthing.exe -version syncthing v1.27.0 "Gold Grasshopper" (go1.21.3 windows-amd64) builder@github.syncthing.net 2023-11-27 03:45:21 UTC

bt90 · February 9, 2026, 10:33pm

Ah and the most obvious part: get rid of Windows 7

Nummer378 · February 9, 2026, 11:06pm

Which OS is required for which go version is codified in a machine-readable way here:

github.com/syncthing/syncthing

compat.yaml

main

- runtime: go1.21
  requirements:
    # See https://en.wikipedia.org/wiki/MacOS_version_history#Releases
    #
    # macOS 10.15 (Catalina) per https://go.dev/doc/go1.22#darwin
    darwin: "19"
    # Per https://go.dev/doc/go1.23#linux
    linux: "2.6.32"
    # Windows 10's initial release was 10.0.10240.16405, per
    # https://learn.microsoft.com/en-us/windows/release-health/release-information
    # and Windows 11's initial release was 10.0.22000.194 per
    # https://learn.microsoft.com/en-us/windows/release-health/windows11-release-information
    #
    # Windows 10/Windows Server 2016 per https://go.dev/doc/go1.21#windows
    windows: "10.0"

- runtime: go1.22
  requirements:
    darwin: "19"
    linux: "2.6.32"

This file has been truncated. show original

Which go version a specific syncthing version was built with is in the docs: Versions & Releases — Syncthing documentation

tomasz86 · February 9, 2026, 11:41pm

Just a note, but as far as I remember, that list isn’t 100% correct, i.e. sometimes there can be discrepancies between Go versions used to built Syncthing depending on the OS.

cosas · February 10, 2026, 7:55am

Thank you guys, I didn’t search deep enough

calmh · February 10, 2026, 9:30am

Indeed. The differences are few and far between though, literally a handful releases over the decade. Consider it >99% accurate.

In any case, the runtime version guide is a bit rough. Our metadata that is now included with the build goes by which version a platform is officially no longer supported in.

However in this case, if it’s correct that v1.27.1 was the first version to break on Windows 7 (which is entirely plausible) then that coincides with the change from Go 1.21.4 to 1.21.5. Support for Windows 7 was officially gone in Go 1.21.0 (Syncthing 1.24.0), but that doesn’t always mean it breaks immediately.

basiliscos · February 10, 2026, 12:17pm

You can fallback to syncspririt, which has less features than syncthing, but is usable, if you still need w7 support. I tested it with recent syncthing releases (2.x) and it seem ok.

mraneri · February 10, 2026, 1:29pm

I ran windows 7 for quite a long time after support ended and I had to revert to 1.27 after the auto update failed.

I reverted to 1.27 and had no problem for probably 1 year after that point before I finally retired the machine.

If you’re still having to run windows 7 I would have no additional concern to recommend running 1.27 on it. It works great.

calmh · February 11, 2026, 10:21am

Of course, as soon as I claim we don’t do Go runtime differences any more, Go 1.26.0 is released and doesn’t build for Windows.

cosas · February 14, 2026, 10:25am

Thank you all. 1.27.0 works OK ATM.