SCCM 2007 SP2 It all started when we got the new machine model in our organization. Ran the task sequence, In the SMSTS log I found Failed to download pxe variable file, which pointed that PE was missing Network driver. Went into Boot images, right clicked and added the network driver for the model. Update Image to DP, Failed. Tried to remove the driver, update to DP failed again. Tried to add a new Boot image, failed with finalized image required error. Could you please help? Do I need to uninstall WAIK? If yes, is there any prerequisite or precaution I should take before doing it on Production server? Is Any instruction document available? Please help.