Another new member of the team. Barry owns his own 'broadband for businesses' consultancy company, and has plenty of rich experience to share with us! Go Barry!!
Note: Please note that you can cause damage to your system if you make a wrong move when editing the Windows Registry, so you do so at your own risk. Back up your registry before attempting to use any of the registry tweaks.
Microsoft states: "MTU (Maximum Transfer Unit) specifies the maximum transmission unit size of an interface. Each interface used by TCP/IP may have a different MTU value specified. The MTU is usually determined through negotiation with the lower driver, using that lower driver value. However, that value may be overridden."
What? English Please!
Hehe ok... Very basically... data that flows around networks travels in the form of small chunks of data called packets. Providing sufficient bandwidth/speed is available, the larger the size of these packets, the more data can be transferred at one time. The value of the Maximum Transmission Unit size specifies the size of these data packets. The MTU size is specified with the Windows Registry, and can be edited to optimise the speed of your connection!
Hey I know my stuff, explain in more detail please :)
The Maximum Transmission Unit the largest defined packet size that can be transferred within one frame of a network. Fragmentation occurs when a transmitted packet is smaller than the packets frame length. As all fragments need to be reassembled, the MaxMTU size should be correct or connection performance levels will reduce.
Step 1: Open up the Windows Registry Editor. To do this click on the Windows Start button, click on "Run" and type in "regedit" before clicking "OK".
Step 2: Find the following registry key: HKEY_LOCAL_MACHINE HKEY_LOCAL_MACHINESystemCurrentControlSetServicesClassNetTrans
Another new member of the team. Barry owns his own 'broadband for businesses' consultancy company, and has plenty of rich experience to share with us! Go Barry!! 
Note: