ok after doing all that, I have had The BSOD error messages BAD_SYSTEM_CONFIG_INFO that went now i have KERNEL_DATA_INPAGE Error 0x0000007a also Calibre Application error 0xc0000185 (Calibre library is a program for ebooks). is my hard drive dead? i have right clicked on drive C clicked check disk, i can only run it after a reboot on stage 4 of 5 chkdsk file data pc hung at 19062 of 128752. Is running a 2TB hard drive to big for the drive that has the OS on. would a smaller drive be better?