about internet speed

[Microsoft Windows]

i wanted to download genshin impact recently but the download speed is so slow even though my internet speed consistently at 300mbps download speed and 60mbps upload speed.....i search the problem on reddit and i found out my command prompt say " receive window auto-tuning level : disabled " which affected the download speed, does that default setting? i tried to set it normal but the command prompt sat it still disable. what should i do?

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