Windows EXE is not shown in above link as these links are for ESXi 6.7 OS. You can open below link for R740 and under operating system you can select windows operating system and search for firmware based on your need. There you will be getting windows .EXE files [URL] 
hi guys  does anyone notice that the "windows version" firmware file of servers(such as R740 or R640) disappear from the download webpage??? i need the windows verison firmware file to upload to the iDRAC of PowerEdge servers so that i can perform update but couldn't find it recently. (the servers are disconnected from internet therefore i doubt that i can use automatic update.) it seemed that lots of firmware's "windows version" file are missing, to whom shall i feedback to???  
win-version driver/firmware missing on the download webpage ?