That ... The problem that I always happens is that after installing several times Windows Vista Ultimate X64 with SP1 Final on AMD Athlon 64 X2 3600+, 2GB DDR2 SuperTalent 667Mhz@DualChannel, ASUS M2N-SLI Deluxe Mobo and HD Hitachi DeskStar 320 GB (40GB partition C:, Rest partition D, sooner or later the boot Vista screen stays as going approximately 50 bars and PC takes to load the OS about 15 minutes ... This does not happen when I have the newly installed Vista, just happens to the long or short period of time (minimum one week). As I was reading, ASUS Mobo M2N-SLI Deluxe is incompatible with the HD having no NCQ ... Whoever I'm is a Hitachi DeskStar HDT725032VLA360 SATA (Not SATA2). Which is what I've to do to avoid this whole issue of burden? The PC has 2 GB of RAM 667MHz running on DualChannel, so I do not think that the problem of slowdown in the bar burden of view either by theme that, but for some time I have been doing the idea ... Or buy an HD or nVidia chipset is that it brings the mother is not compatible with HD who do not possess NCQ as previously explained. Finally, any suggestions? Thanks!