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1) Poorly seated NIC
Check to make sure the NIC is properly seated in the PCI slot. If the card is not in all the way, carefully bend the tab where you screw the card up about 20-30 degrees. Reseat the card, paying close attention to how far it goes down. You want the NIC to seat lower in the slot. Sometimes the NIC manufacturer gets metal plates that were stamped out incorrectly and get missed in quality checks.
2) Changing your NIC to a different brand or model
Switching out the NIC for another brand or model may solve the download problems. Replacing a Kingston KNE111TX for a KNE110TX or for even a completely different brand of NIC such as a Linksys or 3com has helped many people solve their download problems. Some of the cheaper NICs do not seem to like sharing an IRQ with other PCI devices and will result in a PCI IRQ steering problem. The Kingston KNE111TX seems to have this problem quite a bit, but replacing it with a KNE110TX or another brand will fix this problem. If changing your NIC to a different brand didn't work, the PCI IRQ steering issue could be motherboard or BIOS related.
3) PCI IRQ steering issue
Go into the BIOS and check the IRQ assigned to the slot.
If the PCI slot you are using is sharing an IRQ with another device, then move the NIC to a slot that is not sharing an IRQ with another device. Then install it in each slot and try and download. If that does not work, take out any unneeded PCI cards, soundcards, 56 modem PCI card, an extra NIC, etc, and try the last few slots, if it's working, you can add the devices back one by one.
Here are threads to read on this issue with the various solutions that worked:
Changing NIC to a different brand or model.
Switching to a different PCI slot that did not share an IRQ.
4} Bad Modem
We now have a documented case where the cause of this problem was the DSL modem itself. This makes for a more difficult troubleshoot as another modem is needed to check all possible sources of the problem. However, it is pretty rare for the modem to be bad. This also reinforces the notion that the problem is on the customer side.
»Can browse, but not D/L , I need tech help please!
Originally submitted by ADSL Guy & Flippant