All of your minidumps are crashed at ikhfile (ie spydoctor). Uninstall or upgrade spyware doctor will fix the blue screen problem.
Mini020407-01.dmp BugCheck 1000008E, {c0000005, 805bf9e8, a53ec408, 0}
Probably caused by : ikhfile.sys ( ikhfile+f07 )
FOLLOWUP_IP:
ikhfile+f07
b19a5f07 ?? ???
SYMBOL_STACK_INDEX: 7
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: ikhfile
IMAGE_NAME: ikhfile.sys
DEBUG_FLR_IMAGE_TIMESTAMP: 44a9d676
SYMBOL_NAME: ikhfile+f07
FAILURE_BUCKET_ID: 0x8E_ikhfile+f07
BUCKET_ID: 0x8E_ikhfile+f07