Win8 All in One Desktop slowing down network

Background Info: We have started upgrading our Front desk PC's at our branches with Lenovo All In One Desktops. Specs differ from Branch to Branch ( Some Dual COres , Some i3's and some i5's . ) Depending on hoe bussy the branches are.

Some of our branches run Diginet Lines, some ADSL Lines, and some are on Fiber Lines.

We run a programme called Bluebird that is sitting on Hosted servers.

Scenario: At one branch we replaced a oldish XP Machine with a new Lenovo all in one i3, Running Win 8 Pro , Before we ship these to the branch we set it up on our side and remove all of the factory Lenovo Software (These confuse Users).

We went and setup this machine and all seemed to be working fine.....For a day or so........Then the branch started complaining about speed on the network. And it seems that speed is only effected when this machine is on and conected to the network.

This is the only Win8 PC at that branch.

We are getting complaints from a couple of more branches as we are rolling out these Win8 Machines.

NOTE: The branches complaining are the ones on Diginet Lines or V-Sat connections. Branches with Fiber or ADSL CONNECTIONS ARE FINE.

What we done so far: Turned off all outomatic updates. Turned of all programmes ( Adobe, java...ext..) that has some form of automatic updating. Dissabled and deleted all live tiles. There is no Anti-virus on these machines as they have no I-Net access and USB dissabled.

This is getting frustrating as it is only our Win8 Machines causing major slow down on these networks.....

Any Ideas???

Jarate said:

Do a virus scan with an Anti-Virus program to see if there are any viruses on that computer that may be using the Internet. Also, you can right-click on your task bar to open up Task Manager to see if there are any background processes you do not recognize, but make sure you look it up before you stop the process and remove the file.​

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No Strange Processes, we monitored those for a while. Also no viruses as these machines are clean and brand new. Only software on these is office, adobe and a programme called DigiData ( and only on some of them ).

The BlueBird Programme Gets accessed via RDP to two of our Hosted servers.

If this was just one machine at one branch doing this, i might consider some sort of virus might have snuck in. But the chances of this happening on only the Win8 Machines, at seperate branches, with the same result in drop of network speed is just too much.