Looks like I was mistaken ! Microsoft continues to release separate IE CU ! Eventhough they can technically still be installed on W8.1 Client, I wouldn't recommend it because some Client packages have been removed ! It's only a matter of time before this leads to problems one way or another. It seems that it was already the case with the 2025-07 IE CU as well. This is the list of files that will not get updated when installing it on W8.1 Client : Spoiler x64 and x86 files in System32 + SysWOW64 folders actxprxy.dll inetcomm.dll inetres.dll hlink.dll iertutil.dll jsproxy.dll msrating.dll urlmon.dll wininet.dll WininetPlugin.dll in System32\migration SysWOW64\migration