On MaxInfinity Elite, it is ridiculas that connectivity to major software vendor's site is slow, downloading stuff from SAP, speed is practically non-existent at 100KB/s.
Downloading the same stuff from a 20MBps SINGTEL line we're able to get 400KB/s.
That's 1/4 of the speed. Downloads from Microsoft's no diff either.
Please try by performing a wired connection to the Home Gateway and monitor if the issue still persist.
If the speed is still slow, please perform 3x bandwidth tests on broadbandspeedtest.starhub.com/speedtest as well as provide us with traceroute results to the IP address of the SAP server.