Plutonium

Only advantage i could think of is that the b3 database is easily manageable/modifyable because it's sql.
Other than that nothing really, there might be more plugins for b3 since it has been around for longer but afaik development on it has been discontinued.
Also b3 does not support clients like pluto t6 without a custom parser while iw4madmin works with it out of the box.
In short, iw4madmin is just the more modern solution with ongoing development and more features.

Just connect manually http://api.raidmax.org:5000/servers#T6_servers
Open the console with the tilde key and type

connect ip

You can get the ip by clicking on the servers on the online serverlist.

Seems like your connection is very bad.
You could try the torrent http://dss0.cc/alterwarez/download/pluto_t6_full_game.torrent
Includes game + dlcs + latest pluto client.

It should say more than just "error while downloading the file", can you provide a screenshot?
Could be permission issues, run piry as admin.
Also don't double post pls.

where did you download the game from?
If you used the steam mw3 dedi server files verify them via steam.

Just tried the mega one and it works fine.
Google drive one seems to be down.
The torrent also works.

Error: Mouse does a 180 randomly, or behaves funny.
Fix: This is a problem with the base game showing it's age, lower your mouse polling rate to around 100Hz. Also try changing the MW3 process priority from high to normal.

From the FAQ.
Could be related..

It appears you're missing binkw32.dll, try verifying the gamefiles via steam.

butwhybro Maybe the host pc's lan ip changed and therefore the port forwarding rule now points to an ip/a device that doesn't exist on your network.

xylar8910 Thing is the server will use the next free port so if you start the game first it will use 4977 since the game already uses 4976. I recommend setting the port to 4977 in the server start bat and also forwarding that port. Also those port check websites never worked for me, but if you receive "getinfo" packets that means the server is visible on the list.

pollo does it not show which file that is?
Anyways, sounds like a permission issue, try running the launcher as admin.

Abordur It cut your sound? not sure what you mean.

Abordur yes, try launching the game now.

Abordur COPY d3dcompiler_47.dll from

/bo2(3)/t6r/cef/

to

/bo2(3)/

Yes that one belongs to CEF (used for the serverbrowser/main menu replacement which are done in html).
Just try copying that d3dcompiler_47 to the main game folder (where t6rmp.exe is).. not a recommended solution at all tho..

Abordur What does that even mean?
Just tell me which folder the file is in or post a screenshot.

Abordur And where is that file? Could also be an outdated version of the file.
Just do as i said.. what's the big deal. Installing/updating all the runtimes using that tool will definately not hurt your pc.
Who said "You should have a good reason to install them so as not to encounter unnecessary problems"? I merely stated that installing windows updates is a good idea because well, it simply is. Why do you think updates are released? They aren't just for fun, they fix issues/bugs/security holes in your system..

Try this tool and install everything https://www.computerbase.de/downloads/systemtools/all-in-one-runtimes/.
I know it's in german but it should be pretty straight forward to use anyways.

Abordur Does windows update not show an update for it? Should be in "optional components" or smth along those lines.

Abordur said in D3DCOMPILER_47.dll is missing:

.net framework

.net framework is required by most software written for windows.