Be sure to keep all the softwares i have sent you in the links from send space, they will dissapear in a few daysThe last driver took me many many hours of search to find them, and they come from an old HP System ??
Have you tried all the software from R & S ?? The "firmwares files"
https://www.rohde-schwarz.com/firmware/fsp40/And the last one " the service pack 1.20"
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Explications
With a special software i extracted the hard drive image " FUJITSU_MHT2030AT_Media " registry, Windows 11 would not let me load the Hive ..
And i see what the old windows does start
REGEDIT4
[HKEY_LOCAL_MACHINE\TempKeyRR0\Microsoft\Windows\CurrentVersion\Run]
"StartupScreen"="C:\\winnt\\system32\\StartupScreen.exe"
"ShutdownTool"="shutdown.exe"
"DowngradeAgent"="C:\\Program Files\\Rohde&Schwarz\\DowngradeAgent\\DowngradeAgent.exe"
In the old windows\system32\
there is 5 startup files
StartupScreen.exe
StartupScreen_ESCI.exe
StartupScreen_ESPI.exe
StartupScreen_FSP.exe
StartupScreen_FSQ.exe
StartupScreen_FSU.exe
A shutdown Tool
In the old windows\system32\
shutdown.exe
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And finally i think all the R&S software(s) installation
"DowngradeAgent"="C:\\Program Files\\Rohde&Schwarz\\DowngradeAgent\\DowngradeAgent.exe"