Hi newcomer and welcome to the Tom's hardware forum.
1- Always try first in the web page of the manufacturere of the PC or laptop.
2- You would never get the answer to your mail.
3- See answer here, use the vista driver, if doesn't work, your web cam isn't supported for win 7. But I think that your web cam should work with the vista driver or win 7 install the correct driver from internet.
Kindly give Dell Inspron 1420 web cam driver for win7
you can downloads dell driver in dell support/communicate in dell website.then choose dell webcam then you must know that 1420 webcam used a creative driver technologies...why u dont use a cd driver that dell gave on u??I already install that thing on my 1420 inspiron laptop it made it...
so gud luk n be fun when u use it.....