Hard to know with much certainty not knowing your exact setup. But, phones have very nice antennas, and PCs typically do not. If you have a free PCI slot, you might consider adding a wifi antenna. I think there are ways to do it without one as well, though you might have to re-do the contacts on the existing one. And of course, if you can get a hard line on the PC, that will be fastest.
Hard to know with much certainty not knowing your exact setup. But, phones have very nice antennas, and PCs typically do not. If you have a free PCI slot, you might consider adding a wifi antenna. I think there are ways to do it without one as well, though you might have to re-do the contacts on the existing one. And of course, if you can get a hard line on the PC, that will be fastest.