Hi David, welcome to the forum.
Short answer
No — build 26200.8655 by itself is not evidence that the vendor used an incomplete or experimental Windows image. Microsoft lists
26200.8655 as the
June 9, 2026 KB5094126 OS build for
Windows 11 version 25H2, applying to
all editions of Windows 11 25H2. (
support.microsoft.com)
Since you bought the PC on
8 April 2026 and you are checking it on/after
15 June 2026, the most likely explanation is that Windows Update brought the machine up to
26200.8655 after Microsoft released the June update.
About the “missing Terminal Services” part
Some of what you are seeing may be normal for
Windows 11 Home.
Microsoft’s Remote Desktop documentation says the
remote PC you connect to must be running Windows Pro, while the client device can be Home/Pro/other OS. (
support.microsoft.com) So if by “Terminal Services” you mean
RDP host / Remote Desktop server capability, that is
not included in Windows 11 Home.
That said,
Windows Installer, basic networking/TLS components,
System32 tools like
services.msc,
eventvwr.msc,
msiexec.exe, etc. should not simply be missing from a normal Windows 11 Home installation. If those are genuinely absent, that points more toward:
- A corrupt Windows installation
- A bad OEM/vendor image
- A “debloated” or modified Windows image
- A failed/partial cumulative update
- Security software or policy damage
- Disk/file-system corruption
What I’d take back to the store
I would not lead with “they used an experimental build.” I’d say something like:
That is a stronger and more defensible argument.
Quick checks to gather evidence
Run these in
Terminal / Command Prompt as Administrator.
1. Confirm edition, version, and install date
winver
Then:
systeminfo
Look for:
OS NameOS VersionOriginal Install DateSystem ManufacturerSystem Model
2. Check whether Windows Installer exists
Code:
where msiexec
sc query msiserver
Expected result:
msiexec.exe should normally be found in C:\Windows\System32msiserver should exist as the Windows Installer service
3. Check Windows component health
DISM /Online /Cleanup-Image /ScanHealth
Then:
sfc /scannow
If DISM or SFC reports corruption that cannot be repaired, that is useful evidence for the store.
4. Check whether it is enrolled in Insider builds
reg query HKLM\SOFTWARE\Microsoft\WindowsSelfHost\Applicability
If it shows Insider ring/channel information, that would be relevant. Also check:
- Open Settings.
- Go to Windows Update.
- Open Windows Insider Program.
- Confirm whether the PC is enrolled.
My recommendation
Before spending more time on RustDesk/BetterDesk, I would either:
- Ask the store to factory reimage the machine with a clean OEM Windows 11 Home image.
- Or do a clean reinstall yourself using Microsoft installation media.
- If you need proper built-in Remote Desktop hosting or business admin tools, consider Windows 11 Pro, because Home deliberately lacks some of those features.
Do back up your files first before any reset/reinstall. Also, if the PC is only a couple of months old, I’d push the vendor to fix the Windows installation rather than you spending more hours repairing what may be a bad image.
