Compaq Presario C739TU is a model I have using compaq presario c700 of laptop in the product line of HP-Compaq. The specifications are as given.
It comes with an Intel Pentium Dual-Core Processor T2330 ( 1.6 GHz) , 512 MB PC2-5300 DDR2, 160 GB SATA, 8X Double Layer DVD + R/+ RW Writer, 15.4 WideScreen, Wireless LAN, Integrated WebCam & Mic. This machine comes pre-loaded with Windows Vista Home Basic Edition.
If ever you plan to downgrade to Windows XP, you need to install drivers for various hardware. The list of hardware and drivers are given below. Please note that this laptop is designed to work with Windows Vista. Neither Zyxware nor HP-Compaq gives you any guarantee that these drivers will work well with Windows XP as they are not properly tested.