I have experienced a number of crashes on a PC with Windows 8.1, and have analyzed the mini dumps and one full dump so far, and have seen a myriad of different crash results including IRQL_NOT_LESS_OR_EQUAL, KERNEL_DATA_INPAGE_ERROR, CRITICAL_PROCESS_DIED. I've posted the raw dmp files, as well as txt files of the results from running them through the debugger here...
https://onedrive.live.com/redir?resid=F1640CE12DEBCE6B!130&authkey=!ABlrD4zyv8gT_SU&ithint=folder%2ctxt
I've ran memtest86 very thoroughly on the RAM with 0 errors, I've updated all of the drivers, ran chkdsk on the HDD, and cannot find any glaring errors, and the computer still seems to crash at random points in time with different applications running each time. The computer is a custom build if the components matter, and each of the component can be found here...
http://pcpartpicker.com/p/zfmYqs