I installed SP2 on my main disk and I found that DMA is not installed as it was under SP1. I did all sort of things to get it working without luck. Burning a DVD is extremely slow now. 1) I changed to DMA if available 2) I uninstalled-reinstalled secondary channel (Adv. conf tab is missing after this) 3) I uninstalled Intel ultra ata controlled but I have to return to 'previous working conf' in windows startup. 4) I deleted ''HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Class \ {4D36E96A-E325-11CE-BFC1-08002BE10318} ''MasterIdDataChecksum'' s describe at http://www.cdrlabs.com/phpBB/viewtopic.php?t=6645 5) I reinstalled SP2 from CD (update install). Microsoft is the driver supplier on both primary and secondary channels. There is Intel 82801DB Ultra ATA Controller under ide ATA/atapi controllers I did a clean(new) SP2 install on my third disk and it recognizes DMA ultra modes for all devices as it used in SP1. So, my next question are: how may I correct this issue without having to make a clean install on my main installation? If it would not possible, how may I backup-restore all (I mean, ALL) settings and data without altering DMA settings?

http://sniptools.com/vault/getting-back-to-dma-mode-in-windows-xp.htm God made men and then rested, God made women and noone rested since..

I did it (step 4)