Welcome to Linux Questions, whilst there is nothing in the rules that states that you cannot post with a subject of "Urgent", most members tend to avoid posts with these titles, as we are volounteers and therefore not being paid to resolve your issue.
If you have a requirement to have problems resolved on an urgent basis (especially for corporate use) then you should contemplate taking a support agreement with your distribution provider.
Please take time to read the LQ rules:
Additionally please take some time to read Trikykid's post at the top of the Linux Newbie forum:
When posting a question, please try to give all relevant information, for example: I know that you have a Dell Workstation, however I don't know what model it is, what chipset, amount of installed Ram. Is this for home use, work use? What have you tried?
I would suggest downloading some "Live Distro's" and checking to see which one suits your needs.
Check out Distrowatch: http://distrowatch.com/