Just follow the instructions and hopefully we can fix this.
final Note; There is the possibility that the BSod ( Bluescreen ) has been caused by a fault in a memory module, so it's worth getting that checked if the UBCD doesn't work.
And DO NOT wipe the HDD until you do as a replacement Ram Stick should allow the PC to boot up normal.
MM... RAMs usually work well if they are correct... before the boot up sequence begins, try punching the F8 key, for boot menu of windows, and try selecting the Last known good configuration. The windows should roll back any files that were damaged to it's previous state, and enable you to boot normaly.
For Freelancer accounts, I would recommend the FAM - Freelancer Account Manager. Just export the accounts into a file, and send it to yourself on some Webmail service: Hotmail, Yahoo, Gmail...