I have a very serious problem with my newly bought computer. I have just bought Intel Pentium 4 HT 3.0GHz 2mb L2 prescott 630 Intel Mobo D915GAV-L Casing + PSU 350W MSI Geforce 6600GT 128MB (Nx6600gt TD128E) and I have some old things which i plug in my new system (mention below) Kingstone 512MB 400Mhz Ram Seagate 40Gb Baracoda HDD LG Combo drive Creative Live 7.1 SoundCard Lucent Modem Fly Video TV tuner I assemble my computer and install Windows XP pro SP2 (HT enabled in the bios while installing windows). When i completed windows installation and install the driver of Creative Live 7.1 soundcard (Full software instal not only the driver) my computer freezes. I restart my pc and install other drivers (modem, Grafics card..) at this time my system works great. When i again install the Creative soundcard softawre+driver system again held (totaly freez). I restart my pc and this time I Disable HT in the bios then i again install my soundcard drivers now system does not freez and the installtion is completed sucssesfuly. I resatrt my pc and enbale HT in bios and when windows start and loads the soundcard software at startup the system again frezzes. I change the pci slot of the card but it dosent work. I reinstall the windows (HT enabled in the bios) but this time Windows XP Pro 2002 (not sp2), install the soundcard software-driver(whole cd installation) and my PC install the software without freezing. I install other softwares and drivers but system does not freeze. But when i install the SP2 Patch (SP2 upgradation) after restarting my system again freezes on the loading of soundcard software+driver. When I enable HT in bios system helds and when i disable it system does not freeze. Whats the problem? What should i do. I am realy confuse about it. I want to enable HT but it freezes. Plz help me. My soundcard drivers are latest. If someone helps me i ll be greatly thankful to him.