Question Have to reboot modem constantly but only for 1 pc

Jul 10, 2019
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i have to reboot my modem 2-3 times a day because my connection gets worse and worse over time. i can only connect to online game servers just after rebooting modem, and after a few hours i can't even browse the internet or connect to the modem configuration webpage, even though i'm still connected to the internet. i only have to do this for my pc though, there's 2 other pc's in the house and i can play the same games just fine on those ones when i can't on mine. the only weird thing i've been able to find is on the modem configuration page (century link) the "No. of open sessions" under "LAN device session log" for my pc keeps going up(as high as 2000+) until i reboot the modem(goes back down to 200-300), while everyone else's are at >100.

sorry for this messy post, i've been trying on and off to figure this out for a few years but i don't even know how to search for my problem, so i'm asking for help.