AC 1750 Wifi speed and connection keep dropping

[tarunsood]

I have a Netgear AC1750 Wifi Cable Model Router. Lately, the WIFI speeds are dropping and especially bad when I am on VPN. I increased by Comcast speed from 100 to 300 MBPS. But that hasnt solve the problem. I would reaally appreciate if you have any suggestions. 

I have tried resetting and restarting the modem several times...

[plemans]

the problem with a vpn is its limited by the vpn. 

it doesn't matter if you have gigabit service, if your vpn is limited on speed, so will everything going through it. 

What speeds do you get without the vpn running? Thats the key question