Norton Utilities 15 BSOD With Real-time Defrag

I have twice turned on real-time defrag, I have twice received Windows BSOD:

 

+Microsoft® Windows Vista Ultimate 6.0.6002 Service Pack 2

+HP-Pavilion System Model m8530f

+AMD Phenom 9550 2200 Mhz Quad-Core Processor

+nVidia GTX 550 Ti Video Adapter

+8 GB RAM

+ASUS M2N78-LA (HP Viola-GL8E) Main Board

+BIOS American Megatrends Inc. 5.29 4/28/2009 SMBIOS Version 2.5

+Hitachi HDS721075KLA SCSI Disk Drive

 

What a POS!  Why was this product realeased in such inferior condition?