I have just purchased this ADSL Ethernet router:

Extra Value 4 Port ADSL / ADSL2/2+ Modem Router - Ebuyer

When I configured my Internet connection on here I found that I could not access some websites. For example:

Microsoft.com
MSN.com
Windows Live Messenger, etc.

I did some research into this and I figured that I could change the MTU settings on the router and then change them on the computer using drtcp.

I change the router MTU settings from 1500 to 1492 and then I did this on drtcp. It works fine on this machine, however any other computers I connect to this router they will not display microsoft.com or anything like before.

I don't want to be going around changing the MTU Settings every time I add another computer to this router, so is there a setting I could set on this router that it I can connect any machine to it and it will just work.

My Internet connection is Orange Broadband, if you need any other information please let me know.