Try doing a system restore.
dont lose it in the first place
Most likely you have lost the data forever. You might try to google some special software which can help you, but it's unlikely.
no information will be lost
Normally it does not have it.
If you have installed XP in the same partition where Vista was before your itunes library is lost forever.
Due to Power lost all the data will eressed so data lost in volaitile memory.
In order to format Windows XP, you will have to use the installation disc. This will erase all the data that you have on your computer.
There is no direct upgrade from Windows XP to Win 7. Any of version of Win 7 you purchase will remove Win XP and all programs and data. You will need to back up all data and reinstall all programs.
The application data is found here: C:\Documents and Settings\{user}\Application Data
You can't uninstall Windows XP, from the command line or otherwise.
veit ekki :S
what do you do when lost all data on action replay and how to get it back