try open a command prompt and cut an paste this:
“netsh interface tcp set global autotuning=disabled”
you don’t need to reboot, just do your tests, maybe autotuning is screwing up with ye.
if it makes not difference, re-enable autotuning
“netsh interface tcp set global autotuning=enabled”
you might want to try something else too in case the above mentioned trick don’t work…
start, run, type REGEDIT and open it, then find this
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\A FD\Parameters
create a new dword 32bit string in Parameters and name it “DefaultSendWindow”
then double click it, choose Decimal and type this number 1640960
exit regedit, reboot pc and try uploading something