Hi there, I have an old desktop HP Pavilion a747c PC windows XP, Service Pack 3, I replaced my old IDE CD/DVD drive with a new SATA CD/DVD hardware which I hear is faster than IDE/ATA old drives, problem is that does not shows my new cd/dvd on windows anywhere (control panel neither device manager) I look but it does shows on BIOS, I double checked cables and connections to be well connected and pluged to a SATA port on the motherboard, I found and delete UPPER and LOWER filters on registry as per others suggested, but still I don't see my new CD/DVD hardware on windows, since I have an old IDE drive and PC was configured to work with IDE format drive do I need to make some changes on BIOS or what do I need to make it work, do I need to delete IDE drives to make work the SATA drives? or PC should recognized automatically a new hardware I have PTGD-LA/PTGD1-LA/PTGD2-LA motherboard (with 4 SATA ports available)1 SATA port used with my new 1TB hard drive (New Hard Drive using SATA Port #1 on motherboard), 3 more ports available, do I need to uninstall or delete all IDE drives from device manager I did also BIOS update from HP still not shows CD/DVD on windows or device manager, what kind of SATA drives do I need? there is any tool to run a diagnostic on PC, I feel going crazy, I thought replacing a new CD/DVD hardware it will be more easier. I did scan for a new hardware and PC does not do anything, just won't find the new hardware anywhere (CD/DVD) plugged. I Don't know could be a missing a registry key for this item or maybe a virus? I replaced a new Hard Drive 1 TB (SATA) interface on this PC recently working just fine. Do I need to do some changes on BIOS to allow new hardware to be recognized on windows. Please kindly HELP! me if you know how I can fix this problem or anybody run into this kind of problem before. Any HELP will be reall greatly appreciate.Thank you in advance.