putting the update file in the usb key root (1st level) you should be able to see it and click on it ...
alway do a disconnect / un mount in windows for the usb key once copied ...
me make sure extract file to root u-disk but power on scope bootloader does not work.
Okay so it seems there is some bug in the existing firmware.
Change the method and first install the firmware update and later the OS update.
update firmware V6.1.37R17_EN done.
What is the latest version of os? now "UBOOT - OS = 8.3" After the firmware update I still can't install the new os from the link you provided.
Quick check to confirm you on the latest OS:
Check Utility menu for the NTP feature.
You should now also have the Logging feature.
If all ^^ are present and the scope is warned up sufficiently (20-30mins), run the Self Cal.
Continue with normal use and report if problems are solved.