hey Jeff and welcome to the forum

if you connect your pc direct to the modem, leave the duplex setting at default usally works very well.
however you can try to force 10 Mbps halfduplex
quote from
http://dslnuts.com/tips_tricks.shtml"Windows 2000 or XP: to change to half-duplex:
* Open Control Panel.
* Double-click Network and Dial-up Connections.
* Identify the icon for your cable modem connection: usually Local Area Connection.
* Right-click that icon and select Properties.
* Under the ethernet adapter icon, click the button Configure.
* Click the tab Advanced to bring it to the front:
* In the Property box, the property name to be selected varies according to model of ethernet card. Examples are: Network Link Selection, Media Type, Connection Type, Duplex Mode, or any similarly-named property which can have Values looking like Auto-Negotiation, or 10BT, or 10BaseT.
* In the Value box, select a value which either (a) explicitly says half-duplex or semi-duplex, or (b) at least does not say full-duplex [e.g. 10BaseT on its own is OK]. If there is a choice between 10 and 100 with half-duplex, choose the 10. Do not choose 10Base5, 10Base2, or AUI.
* Click OK to exit the Adapter settings.
* Click OK to exit the Connection properties. "
downloa dthis file i attach and unzip it to C:\Program\Cablenut
now open cablenut adjuster, click delete cablenut tweaks and click save to registry
in top left corner click file, click load custom setting, browse to C:\Program\Cablenut and dubbleclick on the file you unzipped
now click save to registry and reboot, also reboot your modem and router for 30 seconds
make speedtest and that Nitro test, copy all text you find including more info and make a new post
VanBuren
