PC Slows When Accessed over the Network

My PC slows to a crawl when someone reads a shared file on my hard disk over the network. I need to keep those shared folders active, but the performance slowdown interferes with my work. What can I do?

Although heavy network traffic can bog down a PC, it may indeed be nothing more than a hardware problem. Specifically, your network adapter may conflict with another hardware device in your system.

If you're using a desktop PC, shut down Windows, unplug the power cable, and crack open the case. Locate your network adapter the card into which you plug your network cable remove the screw, pull out the card, and pop it into a different slot. Reassemble and turn on your PC and see if the problem goes away.

If, on the other hand, your NIC is integrated on the motherboard, it probably shares an IRQ with one of the PCI slots, and thus the PCI card in that slot may be causing the problem. Remove all nonessential PCI cards from your system, and start up Windows. If the problem persists, you may have to shuffle the remaining, essential PCI cards until you resolve the problem. If, on the other hand, the problem vanishes after you remove the PCI cards, shut down your PC and reinsert the cards one by one, reassembling and restarting your system after each insertion, until you find the culprit. If the culprit is a troublesome PCI slot, cover it with a piece of masking tape to remind yourself to keep it unoccupied.
If you're still stuck, you may need to update your network drivers or even replace your network hardware.

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