OK somehow miraculously the CTD's have stopped now after i de'installed all mods and installed one mod that removed random remaining objects in skyrim like arrows etc.
I think it has to do with the game save files getting too big (mine is 15.2mb now) so i don't really know how long i will be able to play.
I also run it with gamebooster i heard it helps vs the visual c++ error
You may have answered your own problems there...If the CTDs stopped after you uninstalled all your mods, then it's likely that it was a mod conflict causing the issues, or a bad load order. Your save file size isn't a problem...I wouldn't call 15.2mb a bloat. There have been some saying that they've got bloats above 30mb (Sounds of Skyrim mod has largely been named as a key cause of bloating in 1.7/DG). I am currently sitting at 15.0 mb, and have no CTDs other than legitimate DG crashes (during Awakening quest).
Besides, the more you play Skyrim - whether it's vanilla or modded, DG or not - the larger your save game will be.
If you want your old mods, activate them one by one and see if it causes any problems. If they don't, you can leave them activated. If they do, check for an update on that mod, if none, deactivate it and wait for the modder it update it.
This is a good place to find which mods are known problems and which aren't: http://www.gamesas.com/topic/1402912-dawnguard-the-mod-compatibility-list/
My Mod List:
Spoiler In alphabetical order - not load-list order.
A Hunter's Life - Hunting Overhaul - hunterprofit
A Quality World Map
ASIS 1.33.1 (BETA update)
Automatic Variants 1.32
Automatic Variants: Bellyaches Animals AV Package
Better Dynamic Snow 2.12
Better Landscape Textures
Better Villages - without smoke and dust
Build Your Own Home 1.82
CBBE 3.1
Categorized Favourites Menu 0.1.15
Crimson Tide - Blood 2.2
Dragonbone Weapons 3.1.6
Enchanting Freedom
Ice of Skyrim 1.5
Immersive Armors - SkyRe Support
Increased Carry Weight from Stamina
JaySuS Swords 13C
Lanterns of Skyrim - Around Cities 2.0
Lore Friendly Armor Pack 1.7.2
Lush Grass 1.4.1
Lush Trees 1.3
Move It Dammit for NPCs and Followers
No Spinning Death Animation
Realistic Lighting with Customization 3.4a
SkyRe Update 0.99.15.2
Skyrim -Community-Uncapper 1.13.3.0
SkyTEST - Realistic Animals and Predators 1.26
Sounds of Skyrim Civilization 1.0
Sounds of Skyrim The Wilds 1.11 - I'm not really suffering any save game bloating from either SoSC or SoSTW...this play through is at lvl 37ish, 1/2 through MQ, explored most of Skyrim, cleared around 1/3 - maybe more - of all dungeons inc. DG dungeons. And my save file is sitting at 10mb.
The 418th Step
The Paarthurnax Fix
Torches for Realistic Lighting
Vagabond Armor 5.0
W.A.T.E.R 1.5
Wearable Lanterns 2.1