Hi, pcpitstop says my pc has unusually low disk performance and has a cache speed of 3MB/s. Ran scan disk & defrag [no bad sectors]. Trying to enable DMA: for generic disk type01 when I check the DMA box, get a warning message; "changing this setting may have undesirable effects with your hardware" will it be ok to check that box or not? A previous pitstop check-up had noted that the DMA was enabled. Recently had the hard drive reformatted and windows reloaded. Thank you.