DPC latency is too high due to the storport.sys file in windows 8. - Microsoft Community
I found the solution - for my particular notebook (Lenovo B575 model 1450, from 2011) - based on AMD E450 APU processor, and SB850 southbridge SATA/USB/PCI/PCIe chipset. I went into Windows Device Manager and foundthe AMD SATA driver. This is the ......