ok here's the situation, i have a homebuilt pc with a dualboot xp/vista setup. the pc is connected to a switch which is connected to the motorola 5120 cable modem, also connected to the switch is my vonage voip device and a cheapo netgear router which connects my other computers together. on my manin pc i am now unable to connect to the internet while in vistawhen hooked up to the switch-modem route. i'munable to ping the modem or do anything that would takethe signal past the modem. i do draw an ip address dhcp server, dns server and gateway informantion.if i boot into xp i can connect with no problems, if i connect the pc to the router i can connect with no problems, i can't connect when plugged directly into the modem with lan line or usb line. anyone have anidea?

Hi, Thank you for your post. Based on the description, I understand that: 1. The network topology in the environment is: homebuilt pc <--> the switch <--> Motorola 5120 cable modem other computers <--> netgear router <--> the switch vonage voip <--> the switch 2. The homebuilt pc cannot access the modem and the Internet if it is hooked up to the switch and you log onto Windows Vista. It works fine, however, if you log onto Windows XP. 3. The issue occurs if the computer is plugged directly into the modem and you log onto Windows Vista. 4. The issue does not occur if the computer is connected to the router, even though you log onto Windows Vista. Firstly, I suggest contacting Motorola to confirm if the cable modem is compatible with Windows Vista since the product is not listed in our Windows Vista Hardware Compatibility List website (http://winqual.microsoft.com/HCL/Default.aspx?m=v). Also, I checked it in Motorola website (http://broadband.motorola.com/consumers/products/sb5120/), there only mentions that the product is compatible with Windows XP. In addition, I would like to confirm if you use a dial-up to connect the Internet? If so, which network device is used to dial up? The issue may occur if the following conditions are true: 1. The environment is using a dialup connection. 2. The netgear router is the device being used to dial up. Hope it helps. Sincerely, Joson Zhou Microsoft Online Community Support

I am going crazy over here. Just got my new Dell with vista last night and setting it up. I have comcast motorola surfboard 5120 modem and downloads are horribly slow. I did a vista automatic update and also installed AVG virus scan and web toolbar to protect for phishing and viruses. Downloads (ie limewire) are horrible. Anything I can do? Thanks1 Intel Core 2 Quad Processor Q6600 (8MB L2 cache,2.4GHz,1066FSB)1 4GB Dual Channel DDR2 SDRAM at 667MHz- 4DIMMs1 Integrated Intel Graphics Media Accelerator 31001 500GB Serial ATA Hard Drive (7200RPM) w/DataBurst Cache1 Genuine Windows Vista Home Premium Service Pack 11 Integrated 10/100 Ethernet1 Internal PCI 802.11g Wireless Network Card1 No Security1 1Yr Ltd HW WRTY, InHome Service after Remote Diagnosis, 24x7 Phone Support1 Windows Vista Premium The 5120 is compatible with vista. Anything i can do? Is it because I have multiple virus checking? Is AVG compatible with Vista? It says so? Thanks