Cubase 6.5 crashing on booting up- Parse error??

Hey there, Cubase is crashing on startup repeatedly.

I’ve recently (a few weeks ago) reformatted my PC with windows 7. Up until now this would happen occassionaly but boot fine the next time, at the end of my last session kontakt 5 threw up a ‘parse error’ or something, now Cubase won’t open at all.

The crash report if helpful reads;

Problem Event Name: AppHangB1
Application Name: Cubase6.exe
Application Version: 6.5.5.176
Application Timestamp: 51c84b7b
Hang Signature: 9ae4
Hang Type: 264192
OS Version: 6.1.7600.2.0.0.256.4
Locale ID: 2057
Additional Hang Signature 1: 9ae4c203cdb612262fb1e03d0ba4f964
Additional Hang Signature 2: b27b
Additional Hang Signature 3: b27b8bcb60db8bb07d7046d1fdfcff24
Additional Hang Signature 4: 9ae4
Additional Hang Signature 5: 9ae4c203cdb612262fb1e03d0ba4f964
Additional Hang Signature 6: b27b
Additional Hang Signature 7: b27b8bcb60db8bb07d7046d1fdfcff24

Hope someone can help, I just wanna make music.

Thanks in advance.