|Dell sucks. Every other company offers them.|
You may be able to get part or all of the data back if you try. There are a number of ways and tools out there. Can't say one is better than the other just try. More depends on how damaged what part is.
It should be possible to use the cd but you would have to change the key with jellybean maybe if it complains later on updates.
Why did it take me over a year to phone in a problem to ATT?