|I have netgears and they have been flawless for almost two years doing wired and wireless.|
Please forgive me if I am wrong but from what you have written it does not appear to me you followed the setup instructions for the router.
On the wan port you need a DNS server or servers listed if you are getting a static address from your ISP. If you are getting your ip dynamically from the isp the odds are so is your DNS servers for the wan port.
Enable Rip. You need it.
If when you say you assigned a static address and now you are slow, where did you assign this static address? If lan side then it has NOThING to do with your bandwidth. Static vs dhcp on the lan side should be the same for bandwidth. A address is a address.
If on the wan side this can be a problem unless you got this assignment from the ISP. If this is the case you need to talk to them. I have seen ISP's assign ip according to bandwidth. Maybe you got the low bandwidth range.
What bandwidth are you paying for?
Concerning the one computer with connection problems. I would suggest uninstalling and reinstalling the nic from scratch. If the nic isn't builtin move it to another slot and/or make sure to diable any devices not being used [like com ports/lpt/usb] so you have more bios resources available. Looks to be a tcp/ip binding to the nic driver problem or a irq/resource conflict.