I just moved from a 1GHz Pentium3 HTPC to a 2GHz Pentium4. Because I assumed I'd have to re-install Windows because of the different Intel motherboiard chipset, I took this opportunity to jump from WindowsME to WindowsXP Home at the same time. I have to say, going from a 1GHz P3 WinME to a 2GHz P4 W?inXP Home makes surprinsingly little difference to a TheaterTek HTPC or DScaler. I don't bother running any PC games on a Radeon DDR on to a CRT projector because the frame rates aren't as good as the Geforce2 in the other desktop pc and with no orbiting, I'm afraid of burn-in wear. 2GHz lets me run DScaler with TomsMoComp de-interlacing and sharpness, temporal comb and a noise filter, but I'm not even sure it that looks so much better than Video (Adaptive) de-interlacing and just Noise (Gradual)? Bootup is a little faster, but shutdown is slower (Girder 3.2 remote controlled). Perhaps this is also because I've set hard disks to spin-down after 5 minutes because my DIGN case lets out more noise than the old case. I'm currently using 3 hard discs in there! I only really went to WinXP because it allows an NTFS hard drive partition to allow working with captured AVI files over 2GB in size. I can only remember about two Win9X blue-screen crashes with in a year of HTPC use, so protected mode stability isn't really an issue if I'm only running TT or DScaler or WinAmp one at a time. Oh and m-audio drivers (for my Audiophile2496, and most WDM WinXP drivers apparently) don't output bit-perfect music, whereas the VXD ones I used on WindowsME did. There's a workaround, using an ASIO output plug-in for WinAmp, but I still suspect it doesn't sound as good as the WinME build. DD5.1 and DTS work from TheaterTek 1.5, as long as using the latest m-audio beta WindowsXP drivers. Even add/removing all components I don't need and disabling all services I don't think I need, WinXP feels heavier. It's about 800MB larger too at about 2.1GB system in total. I'm thinking of restoring my WindowsME ghost image onto the hard disk of this Pentium4 system. Booting Safe-mode and plug'n play auto-detect may allow me to get the new chipsets running on WinME without a re-build from scratch. I'm sure TheaterTek 1.2.8<mumble> will immediately need a new softId key (I've already got a new one for WinXP/P4 2GHz) before I can upgrade it to TheaterTek 1.5. I don't want to go through the hours of backing-up WinXP and resoring WinME if I can't get it running quickly, I don't want to spend time re-building WinME from scratch. Oh, and I was running Radeon 7075 drivers on WinMe. Anyone know if that's ok for TheaterTek 1.5? Any experience of this, comments and suggestions appreciated. regards, Rob.