if the info is that important try not to use that laptop until you find a solution or give up any and all data that is written to the drive could wipe what potentially could be saved.
You ?might? be able to use a program like recuva but if possible 1) any undelete program (probaly will not work in this case but might) run from a usb drive (preferably downloaded and installed onto usb from different machine) and 2) reover any files to a differnt source (another drive, usb drive, usb stick, etc) but not the same as the drive with the files
you can even go to a site called portableapps and get a file recovery put on a usb stick that will load and look like a windows type access, but remember any usage of the drive (even for temp files, page swap, etc) could overwrite data.
as Brighttail says, if that important look for a data recovery service