

There is a patch/mod from Microsoft that fixed my issue. I finally found something that works after searching for slow wifi with VPN. I searched the Intel and Lenovo boards for solutions without finding a working solution. I had this same issue on a Lenovo T14 running Win 10. I don't even know where to start looking - since it happens on both Windows and Linux, would the problem most likely be with the hardware? I'm also wary of sending it back to Lenovo to be fixed since it's possible it will work fine when they'll test it. Sometimes after a reboot, the wireless speed would be similar to the other devices, but later on it would go back to being extremely slow. This seems to happen both in Linux and in Windows and it's not consistent (but it's definitely the vast majority of the time). The 2.4GHz bands seem to be alright though. I've tried setting different channels (36 and 40 in addition to Auto), but the problem persists. My other devices are much faster - both my phone and the laptop the T14 is replacing (an XPS 13) are getting 20-70Mbps DL and 15-20Mbps UL on my slow-ish broadband connection. Last speedtest was 2Mbps DL and 0.7Mbps UL. But I feel ashamed I don't know what technology I'm actually using.I have a very strange issue: the wifi connection to my ISP's modem/router (it's PlusNet in the UK if it matters and the router is called PlusNet Hub One) is really really slow when connecting my thinkpad to the 5GHz network.

I'm installing a new Windows (XP or 7) operating system on my Lenovo laptop.
