Brand new PD4 installation (using an existing BootCamp partition ~36GB). First thing I did was go to Windows Update and successfully DLed SP3, but the installation fails claiming that there is not enough space on C:\WINDOWS\$NtUninstallKB898461$ to install the service pack. There is over 32GB free on the drive - so what might be going on there?
Are you trying to install the updates loading natively to Windows? It looks like a Windows-related issue, I would suggest to check the following link: http://www.windowsreference.com/general/error-there-is-not-enough-disk-space-when-installing-sp3/
