Wifi got VERY slow on PC after reboot, whilst it's good on phone.

Aug 20, 2018
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Hi, I've had a problem haunting me since I cleaned my PC to fabric new.
My wifi is extremely slow on PC, and I'm sure the problem is within the PC cause all other devices is working fine and also the PC has no problem with hotspot.

I have targeted some NEW anomalies (after the reboot):
-Slow downloading speed
-Disc is struggling since it's 100% active (task manager)
(It's not 100% when no action is made, but as fast as I play a game or something it go up to 100% and stay there for minutes after I stop playing, then it drop to 0%-15%)

After reading ALOT of threads on simular problem without any help I suspect I got a problem with my network card. I have one
that's called ''Qualcomm Atheros AR9485 802.11b/g/n WiFi Adapter''.
It's quite old yes, but the problem is very new and came after a specific action so I hope for a solution.

I appreciate every effort to help! Thanks!
/Erik