haroonsj, Thank you for using the Dell Community Forum. You will need to install the Sata Driver. On one of the setup screens is an option to install drivers on the lower right side of the screen. Choose this option and put the Dell Driver disk in. The driver it is looking to install is the Intel Matrix Storage Driver. If you need to download this driver and put it on a disk you can click the title below. Another way to complete the install without first installing the driver is to change the bios setting to ATA. To do this restart the system and press F2 to enter setup. Once there you can TAB down to Onboard Devices and hit Enter. Then tab down to SATA Operation. You will then see at the top of the screen on the right side ATA and AHCI. Change this to ATA. Save the changes and exit out. Once the system restarts you should be able to complete the install. After the install and you have loaded the drivers you will need to go back into the bios and change the setting back to AHCI. Intel Matrix Storage Manager - Notebooks    
Hi Pros,I am installing Vista from fresh coz Harddrive stop working now when I try to install it stuck on completing installation.......... After few hrs of this it is just I mouse on the screen nothing.any idea.I try to install from other DVD as well same problem this could be Ram or what Thkxs
Inspiron 1720 Windows vista install stuck on completing 
installation...................