Hi Stee - R4 ALX,
Thank you for your reply. Please follow the steps provided below to change the MTU:
1. Open a command line window as an Administrator (ie. right click on All Programs > Accessories > Command Prompt and select Run as administrator) ...
2. Type the command netsh and wait for prompt
3. Type the command interface and wait for prompt
4. Type the command ipv4 and wait for prompt
5. Type the command set subinterface "Local Area Connection" mtu=xxxx store=persistent .
6. Replace xxxx with the value of MTU that you would like to set.
Please let me know if you need further assistance.