Why is BitTorrent using so much CPU?
Make sure you’ve checked your computer for incompatible software known to cause high CPU usage in BitTorrent. If you don’t have any incompatible software installed, get Process Explorer and run it. If you see the DPCs are using significant amounts of CPU, then you may have some other buggy software installed, or perhaps buggy drivers and/or hardware. You can try running RATTV3 to find the source of the DPCs. The RATTV3 output can be found in %SystemRoot%\system32\LogFiles\RATTV3. Another possible source for high CPU usage may be the transfer mode that your hard drive controller may be using for your hard drives. Check the “System” applet in the Windows Control Panel for the Device Manager. In the Device Manager, look for the IDE ATA/ATAPI controllers and check the properties for each of your primary and secondary IDE channels to see if any of their current transfer modes are in PIO. If so, this may be the cause of your problems. To fix it, try uninstalling the affected IDE channel and
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