You might consider that your ADSL modem is bad; those also go bad just like routers do. When faced with this kind of problem, and after replacing my router as you did (good job there!) the problem persists, it's quite likely that your ISP has changed something in their network and your ADSL modem may need a firmware update. (they do this every couple of years or so). It's best to call them on the phone and ask them to run what we call an
"end-to-end" test on your Modem. This will determine if they can update the Modem firmware remotely or not. They may try this and everything will magically be fixed.
This has happened to me with a number of clients on both Verizon(now Frontier) and Charter, 2 of our main ISPs here where I live.
It might clear up some things if we knew the
EXACT version of W10 you are running as there are now dozens of versions out there since W10 release date of 7.29.2015. Click on the Start button in W10, and use the
<windows-logo-key> +
<R-key>which brings up the run command box. Type in the command
"winver" into and W10 will pop up a box similar to this:
**NOTE: we need both the Version number (
ver.1511 here) as well as the OS Build number (
B10586.589) show in the picture above here in the
Red Box.
If the problem persists after your ISP (Telstra?) tests your Modem and attempts to install a firmware update is that they may tell you one of 2 things:
(1.) Your Modem failed the firmware update, so they have to send you another one; or
(2.) You Modem completed the update, but your problem persists. If it's
#1, then you just need to wait for a few days for them to send you a replacement; plug in and retest. If it works, problem fixed!
If it's
#2, then you'll need to insist that they resolve the problem as you believe it's on their end in their equipment.
At that point, I usually insist that the ISP send out me or the Customer I'm helping a brand new Modem regardless. The phone support tech will resist doing this, so you will most likely need to speak with a Supervisor and possibly threaten to leave them if they don't do this. In most instances, when they send you a replacement Modem, things will then work.
If they still don't you will have to stay on them until they fix it. This happened with me with Verizon back in the beginning of this year. They sent me a new Modem. Still couldn't fix it. After 3 weeks of no Internet, I gave up and switched to a different ISP! No problems so far.
There are no guarantees this will work, but it might be worth trying. It appears that there is something different hardware-wise going on in your PC than in your Surface Pro3. Is that PC a self-built rig? Would you mind providing us with system specs? Make/Model Mobo, GPU card, CPU chip, PSU Make/Model/Wattage. This might provide us with some insight into why the Surface Pro works and your PC does not. In the meantime, hope that the call to the ISP to test your Modem and update or replace it might solve the problem in the meantime.
Keep us posted.
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