why is the clock speed set to 600 mhz why not default 1200 mhz
You must hit ESC while booting, then navigate to Raspberry Pi Configuration, then Processor > Speed and set it to Max.
oh ok thanks didnt know
is there a reason that its not set to that at default
AFAIK: Mainly because we aren’t copying over any configuration files in the Core Package, and the Max setting is disabled by default in the UEFI firmware because, unless you have a strong enough power supply, it can cause an immense power draw when running Windows.
After fixing your speed,you can change the config.txt for overclock and usb current.You can edit it in windows itself while running