Burning speed has slowed since sp3 (HP DVD740i)

[qanda]This thread is about the HP DVD740i. Click here to see full specs[/qanda]since downloading sp3 my burn speeds have gone from about 20 minutes to over 2 hours. i use dvddecryptor and use the hp dvd writer 740b

Hi and Welcome!

make sure, the drive runs in UDMA mode: http://club.cdfreaks.com/f61/troubleshooting-enabling-checking-dma-windows-vista-xp-2000-me-9x-101616/