Solved! Only one device slow on WiFi network

[OldGoatBarry]

I have a weird situation and I hope someone can help.

All of my devices connected to my WiFi router have "reasonable" internet speeds except for my laptop which recently slowed to barely usable.
My cell phone and tablet shows speeds of around 5Mbps where my laptop shows speeds of 0.2Mbps. They are all connected to same WiFi and are all in the same area.
I have performed troubleshooting and Windows (10) finds no issue.
I have flushed DNS, removed and recreated network access points, rebooted router and laptop (often) , uninstalled network card and reinstalled.. nothing works.
If I use a LAN cable the speed is normal.
Using new ASUS Viviobook, Windows 10 (all updates done and latest drivers)

Please heeelp

 

[helpstar]

which wifi driver version did you install?
Which exact wifi chip is inside your vivobook?

Is the windows firewall set to private and not public?

Disconnect any device from the router´s wifi and test the speed again.

uninstall the antivirus software for testing purposes

What´s the link speed of the laptop?
https://www.windowscentral.com/how-determine-wi-fi-and-ethernet-connection-speed-windows-10

 

[OldGoatBarry]

Hi.
I installed, as asked to by Asus, this one https://dlcdnets.asus.com/pub/ASUS/.../LAN_DCH_Realtek_Z_V10.34.0603.2019_14326.exe
Chip is Realtek 8821CE Wireless LAN 802.11ac PCI-E NIC

Firewall is set public and private

Disconnected all other devices from wifi and still no change

Only using windows defender so cant really uninstall

Link speed shows at 292/292 (Mbps)

I have also tried someone else's wifi and have the same issue

 

[OldGoatBarry]

Laptop was purring along nicely until 2 days ago and nothing has changed

 

[mejustsayin]

did you try another wifi at a family, friends, or business location to see if things are still slow?

 

[OldGoatBarry]

Yes, I tried at a place over the road.

 

[mejustsayin]

Yes, I tried at a place over the road.

so was it slow there or not?

 

[OldGoatBarry]

Yes, was the same

 

[mejustsayin]

so it is a laptop issue, not your home wifi. try booting to safemode with network and see if it is still slow. this will eliminate any third party utilities or programs.

https://support.microsoft.com/en-us...ndows-10-92c27cff-db89-8644-1ce4-b3e5e56fe234

 

[OldGoatBarry]

Booting into safe mode with network did not activate wifi so couldn't test

 

[helpstar]

check windows integrity
open the command prompt as administrator and type DISM /Online /Cleanup-Image /RestoreHealth
https://www.lifewire.com/how-to-open-an-elevated-command-prompt-2618088
https://answers.microsoft.com/en-us...em-files/bc609315-da1f-4775-812c-695b60477a93


clean boot
https://support.microsoft.com/en-us/help/929135/how-to-perform-a-clean-boot-in-windows

 

[OldGoatBarry]

My life saver . Disabling all start-up items did the trick. I didn't see any that should pose a problem but seems I was wrong . Speeds are back to normal. If I find the offending application, I'll post it back here.
Many thanks