Upgrading to Windows 11 24H2 causes remote desktop connections to Windows 7 machines not to show graphics correctly.

It looks like mstsc in Windows 11 24H2 no longer understands bitmap updates that contain multiple rectangles. It seems to draw the first rectangle (maybe) and ignore the rest. It's not clear whether this change is intentional.

FreeRDP updated their code to deal with this by restricting all bitmap updates to a single rectangle.

Try to download Remote Desktop App from Microsoft Store

Use it instead of classic RDC App. For me worked!

Hello,

When using mstsc, you can open the advanced menu, select "Experience," and then try checking or unchecking the "Bitmap caching" option to see if it helps.

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I have the same problem, on a windows server 2008, the display of certain applications like oracle sql develloper is unreadable.

I found article

https://forums.mydigitallife.net/threads/discussion-windows-11-build-26100-pc-24h2-retail-ge-release.88220/page-92

and there is helpful two comments

1. "If I use remote desktop client from MS store, it works well, without artifacts, but this client is very limited. It not maps printers, and I need to print."

Like suggest Richard (FreeRDP)- but below app is from MS

I tested app with icon with red circle and signs >< inside - and artefact (on APP via RDP) does not occur.

2. "I just tested and it seems to work.  You need to copy these files

C:\Windows\System32\mstsc.exe

C:\Windows\System32\mstscax.dll

C:\Windows\System32\en-US\mstsc.exe.mui

C:\Windows\System32\en-US\mstscax.dll.mui"

(on Client PC)

Before You will change this files i sugest create copy of theme.

I coped from C:\windows.old this files (but when You usage Windows in another language this en-US directory be diferent - corectly to OS language) and

I cope files on Windows Recovery Mode (press and hold shift when You click reboot OS; on Recovery mode -> Trabelshoot -> Advanced options -> Command Prompt) - becouse when OS normaly works, this files is lock.

Useful comands on cmd

-to change partition:

C:

-after chenges partition to C: - changes folders

cd c:\Windows\System32\

-to list files on directory or check file size

dir mstsc.exe

-delete files

del C:\Windows\System32\mstsc.exe

-copy files between folders (first is source directory second is destination directory)

copy C:\Windows.old\System32\mstsc.exe C:\Windows\System32\mstsc.exe