Internet disconnecting only when downloading

New to posting on forums so sorry if I dont give all necessary info on the first post.

been searching online for a while to find a fix. Ive seen a few posts here and there with the same issue but none of the fixes have helped.

Internet works totally fine for surfing, streaming videos of high quality, gaming, skype/voice chatting. But when downloading any files, be it small or large, the internet to my PC alone gets disrupted periodically, to the point that it is a trial on the patience to download any files. the modem/router and all other signals show the internet running fine. all other equipment utilizing the internet runs perfectly fine as well. the only signal I get that shows there is an issue is that little yellow triangle on the taskbar.

I am running on wifi but have tried a corded connection to see if it would fix or at least improve the issue but no difference was made
running windows 7

things I've tried to fix/change:
turning it off and then turning it back on
ports
new networking card
new router
new modem
resetting all hardware
firewall settings (both windows and antivirus)
disabling firewalls.
changing downloading speeds
disabling all background programs using any bandwidth
turning off all other devices connecting to the internet besides the pc im using.
disabling all torrent software.
reinstall windows
updated all software
uninstall/reinstall related software
flushing dns along with a plethora of other cmd commands
disable/enabling ipv6
disable/enabling bandwidth management softwares
changing router channels

any help appreciated and thank you in advance.
 
Back