Hi Rein
I have never come across this error before. Error code 1327 means "1327 Logon failure: user account restriction.", so why U are getting "Invalid Drive K:\" message is a mystery to me, but I think this error may be because U are not an administrative user.
The installer MUST be run as Administrator - it should anyway, but just to be sure, after downloading the file, right click and use the "Run as Administrator" option.
You will get the usual W10 UAC warning pop-up but everything should install OK. If not then it may be that your anti-virus software is blocking installation, if that is the case then you will need to add an exception for setup_G8JCFSDR_280.exe to your anti-virus settings.
Hopefully you will soon be on the air :-)
Please let us know how it goes.
73
Peter - GM8JCF
