Question My Lenovo internet is too slow

[bidsalvaterra]

Hi, so i bought this lenovo S340-15API and installed a Windows 10 on it, now i started noticing that its internet is too slow, i try to use my other computer on same Wifi i get a speed of >1.8mb/s, but on this lenovo it is <400mb/s. I noticed that when i shutdown and start the pc, its internet speed is normal(>1.8m/s) but after 5 minutes it gets slow.
I have updated the BIOS, and Network Driver and got not solution.
Please would someone help me?

 

[rgd1101]

malware scan?
got all the windows 10 update?

 

[bidsalvaterra]

Yes i have all the Windows 10 updated.
And right after having the OS installed i've got this problem so i dont think malware is the problem