Stuck on "Authentication"

Phoenix, can you try running a traceroute and a pathping to the following addresses for me?

s2-beta.logon.battle.net
xx.depot.battle.net

When posting the reports, please highlight them and click the pre button to encase them in code blocks. This will make them easier to analyze. :)
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Technical Support: Sunday-Thursday, 12pm - 9pm Pacific Time
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Thanks for the reports! It looks like there may be something that's bogging down your network connectivity. The speeds look good for the most part, but there are some spikes/hiccups that are showing that may explain the symptoms you're seeing.

When traveling to S2-Beta.logon:
10 * * 192 ms ae-4.r22.londen03.uk.bb.gin.ntt.net [129.250.5.24]
11 370 ms * * ae-4.r22.nycmny01.us.bb.gin.ntt.net [129.250.3.126]

The asterisks here represent lost data packets at those network hubs. Your computer sent data out, but it never received it back from that location.

Heading to the xx.Depot server:
3 146 ms 108 ms 18 ms 78.39.161.170

The italicized numbers represent the time in milliseconds that it takes to travel there and back. This is essentially within your local network (somewhere between your house and ISP) and the numbers should be low (below 25ms in most cases). On your first trace, they were between 18-20ms. Since there's a delay here now, that could indicate that your network modem has a bunch of cached data that may be causing it to react weirdly.

Let's try resetting your network devices to clear out your modem/router's memory. Once that's completed, let's flush out the DNS as well:

1.) Hit Windows+R on your keyboard to open the Run box.
2.) Type the following and hit enter: cmd
3.) With the Command Prompt open, type each line and hit enter after each one, allowing a few seconds for the procedure to complete:
ipconfig /release
ipconfig /renew
ipconfig /flushdns
4.) Type exit and hit enter to close the Command Prompt

Give that a go and let me know if you see better performance in-game!
______________________________
Technical Support: Sunday-Thursday, 12pm - 9pm Pacific Time
How am I doing? // https://www.surveymonkey.com/s/Glaxigrav \\

Can you run a WinMTR for about 5 minutes to the addresses and post those results as well?

1. Download WinMTR
2. Unzip the WinMTR.zip file to the Desktop.
3. Open the WinMTR folder and select the 32 or 64 bit version. Choose whichever one corresponds to your version of Windows.
4. Run the WinMTR.exe
5. Type the IP address you want to trace in the "Host" field. For our purposes, we're going to run to this again:
s2-beta.logon.battle.net
xx.depot.battle.net
6. Click on "Start" and then launch the game. Leave it on the authentication screen (and running) for about 5 minutes, exit, and click "Stop" to stop recording.
7. Click on "Copy text to clipboard" and paste the results into your next forum reply.

In addition, can you post the additional programs running on your machine?

1.) Hit Windows+R on your keyboard together, which will bring up the Run dialog. Then type the following and hit enter: msinfo32
2.) In the window that opens, click on the + sign next to Software Environments, then click on Running Tasks. Click on one item on the right side, click on Edit, and then Select All (Or hit Ctrl-A). Click on Edit, and the Copy (Or hit Ctrl-C)
3.) Paste that into a reply.
4.) Go back to MSInfo and click Services, click any item on the right, click on Edit, and then Select All (Or hit Ctrl-A). Click on Edit, and then Copy (Or hit Ctrl-C)
5.) Post that back as another reply.

When posting the reports, make sure to use the Code Blocks again. :)
______________________________
Technical Support: Sunday-Thursday, 12pm - 9pm Pacific Time
How am I doing? // https://www.surveymonkey.com/s/Glaxigrav \\