Laptop internet problem

Hey there. Non computer guy with a problem hooking up an almost new laptop to my Tmobile wireless modem/router.

This is my computer, bought at Best buy in Nov

Lenovo - Ideapad 3i 15.6" FHD Touch Laptop - Core i5-1155G7 with 8GB Memory - 512GB SSD

I am using the tmobile internet on both my TVs, another laptop and home computer and phones.  All work fine.

This new computer worked fine at home for first few months. Then slowly needed a reboot or took awhile. Now, although it shows connected, and will initially open up either Chrome or Edge, neither will work past the first initial screen and maybe one other click...ie Yahoo, but then says can't find internet.  

Laptop works everywhere else but at home.  Geeksquad says all good with the laptop, brought it in.  Tmobile says wireless network working fine.  Lenova says it's not a hardware issue and to get any further help with the software side, I have to pay them some more money. (still under warranty of course)  They were ZERO help.

Have rebooted anything and everything many times. Deleted networks and renamed them as Tmobile suggested. But still won't hook up, while all other devices work fine.

Not sure whether to ditch the laptop or Tmobile, but they are both new so need to figure it out.

Thanks for any ideas.  (I'll have to bring it to work to download anything as obviously, can't do much at home)

Hi, Welcome to BC

I think this is your Support Page : https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/3-series/ideapad-3-15iil05/downloads/driver-list

Are you up to date on BIOS and the rest of your drivers here including your network ?    Try the Diagnostic from the page.

Not to put a damper on your system but 8GB Memory - 512GB SSD is not much and system is bogging down for lack of Ram.

Can also try this : https://www.bleepingcomputer.com/download/adwcleaner/  Do not skip the last step it will reset your network.

Also try from Start -->Search type CMD for a Dos Command Prompt and right click the CMD for Administrator then type in the Dos Prompt    ipconfig /release

and reboot and should search for a network and connect.    Can also use the Command    ipconfig /renew

Most of these still work : Reset the network on the system

Open Settings
Click on Network & Internet
Click on Status
Click on Network reset
Click the Reset now button
Click Yes to confirm and let your computer restart

It may take a few extra time for the system to completely reboot since it is rebuilding the network then try the network and let us know.

The other way is to run some commands through the Administrator Command Prompt.

Open an Administrator Command Prompt

Type the following commands, pressing Enter after each command:

ipconfig /flushdns
ipconfig /release
ipconfig /renew
nbtstat -R
nbtstat -RR
netsh int reset all
netsh int ip reset c:\resetlog.txt
netsh int ipv6 reset
netsh int ipv4 reset
netsh winsock reset catalog

Reboot the computer

Forgot : Turn off MS Fast Start : https://support.lenovo.com/ca/en/solutions/ht513773-how-to-enable-or-disable-fast-startup-on-windows-11