Here is an error that I’ve got while trying to PXE boot laptop.

Windows failed to start. A recent hardware or software change might be the cause.
File: WINDOWSsystem32DRIVERSiaStor.sys
Status: 0xc000035a
Info: Windows failed to load because a critical systme driver is missing, or corrupt.
The fix was a simple one. Open SCCM console and delete Boot images, then create them again and this should fix the issue.
I’ve shown how to recreate boot images here:
http://www.kozeniauskas.com/itblog/2009/02/08/sccm-adding-deleted-boot-image/