Hmm... As far as the save game crash, unless its related to a missing/required mod then the only thing I can think of is maybe the save could be corrupt. And as far as gamebooster, I just recently built a monster gaming rig, the gamebooster just shuts down uneeded processes because skyrim can CTD simply just by programs switching variables and whatnot during gameplay (think anti-virus/spyware programs and updates for example), though I realize it may not help everyone... I certaintly don't have the save game CTD. I too had massive mod issues resulting in CTDs and it seemed hopeless really, but where theres a will theres a way... its just a matter of finding the way. And in a game as big as Skyrim the variables are massive as to what causes CTD for different people. But if your having save game issues with vanilla Skyrim then I'm really not too sure. Sorry I couldn't be of more help... all I know is what worked for me - fresh vanilla install of skyrim, all dlc install, hd texture pack, official/unofficial patches including hd texture patch --- then full S.T.E.P. install to the T --- then a few extra mods that are well known. I dunno if your familiar with STEP, but its a 3-6 hour process depending if you have the mods on your system already. That is all I could recommend. Good luck to you! If I come across some useful info I will share it ASAP.