I have tested both at 64bits 0fg1d2c-win64 and 0fg1d2c-win64-vc12 with yhe same resulis.

blender disapears hiting Enable Dynamic at brush tools Topology

yks.

I assume you have that even with default scene?

Antony, thoughts?

It shouldn't happen.

19e627c is the official release which should not crash at all.

• Can you try with factory settings?
• Can you try with VBO on-off?

What GPU do you have? This looks suspiciously like a GPU problem but might be related to add ons as well.

i have done al tests with fresh downloades and installed blender as well as with default scene. for all verion I tryed,

with VBO off:
blender starts and it blows up when you hit Enable Dynamic at brush tools Topology

with VBO on tllded (tilded at File > User Preferences > System > VBO (just bellow Anisotropic Filtering)

blender makes an splash entry a inmediatelly disapears.
there is no way to undo VBO, just uninstaing and reinstalling it

my graphic card is NVIDIO Gerorce 8600 GT
win 7 ultimate - 64 bits
i5 CPU - 16GB ram mem

Can you generate system info (Help menu -> System Info then go to the blender text editor {shift - F11} and select the system-info.txt file from the drop down at the bottom) and paste the contents of here?

Blender 2.70 (sub 0) System Information

Blender:

version 2.70 (sub 0), branch b'master', commit date b'2014-03-19' b'05:02', hash b'19e627c', b'Release'
build date: b'2014-03-19', b'21:09:05'
platform: b'Windows:64bit'
binary path: 'C:\\Program Files\\Blender Foundation\\Blender\\blender.exe'
build cflags: b'-DWITH_FREESTYLE /nologo /J /W3 /Gd /w34062 /wd4018 /wd4065 /wd4127 /wd4181 /wd4200 /wd4244 /wd4267 /wd4305 /wd4800 /we4013 /we4431 /openmp -O2 /Ob2 -DNDEBUG -DWIN32 -D_CONSOLE -D_LIB -D_CRT_SECURE_NO_DEPRECATE -DOPJ_STATIC -DWIN64 -DWITH_MOD_FLUID -DWITH_MOD_OCEANSIM -DLITTLE_ENDIAN -DWITH_AUDASPACE -DWITH_AVI -DWITH_OPENNL -DWITH_BOOL_COMPAT'
build cxxflags: b'/nologo /J /W3 /Gd /w34062 /wd4018 /wd4065 /wd4127 /wd4181 /wd4200 /wd4244 /wd4267 /wd4305 /wd4800 /we4013 /we4431 /openmp /EHsc -O2 /Ob2 -DNDEBUG -DWIN32 -D_CONSOLE -D_LIB -D_CRT_SECURE_NO_DEPRECATE -DOPJ_STATIC -DWIN64 -DWITH_MOD_FLUID -DWITH_MOD_OCEANSIM -DLITTLE_ENDIAN -DWITH_AUDASPACE -DWITH_AVI -DWITH_OPENNL -DWITH_BOOL_COMPAT'
build linkflags: b'/SUBSYSTEM:CONSOLE /MACHINE:X64 /STACK:2097152 /OPT:NOREF /INCREMENTAL:NO /NODEFAULTLIB:msvcrt.lib /NODEFAULTLIB:msvcmrt.lib /NODEFAULTLIB:msvcurt.lib /NODEFAULTLIB:msvcrtd.lib'
build system: b'SCons'

Python:

version: 3.3.0 (default, Nov 26 2012, 15:38:36) [MSC v.1500 64 bit (AMD64)]
paths:
'C:\\Program Files\\Blender Foundation\\Blender\\2.70\\scripts\\addons'
'C:\\Program Files\\Blender Foundation\\Blender\\2.70\\scripts\\startup'
'C:\\Program Files\\Blender Foundation\\Blender\\2.70\\scripts\\modules'
'C:\\Program Files\\Blender Foundation\\Blender\\python33.zip'
'C:\\Program Files\\Blender Foundation\\Blender\\2.70\\python\\DLLs'
'C:\\Program Files\\Blender Foundation\\Blender\\2.70\\python\\lib'
'C:\\Program Files\\Blender Foundation\\Blender'
'C:\\Program Files\\Blender Foundation\\Blender\\2.70\\python'
'C:\\Program Files\\Blender Foundation\\Blender\\2.70\\python\\lib\\site-packages'
'C:\\Program Files\\Blender Foundation\\Blender\\2.70\\scripts\\addons\\modules'
'C:\\Users\\adri\\AppData\\Roaming\\Blender Foundation\\Blender\\2.70\\scripts\\addons\\modules'

Directories:

scripts: ['C:\\Program Files\\Blender Foundation\\Blender\\2.70\\scripts']
user scripts: 'C:\\Users\\adri\\AppData\\Roaming\\Blender Foundation\\Blender\\2.70\\scripts'
pref scripts: None
datafiles: 'C:\\Users\\adri\\AppData\\Roaming\\Blender Foundation\\Blender\\2.70\\datafiles\\'
config: 'C:\\Users\\adri\\AppData\\Roaming\\Blender Foundation\\Blender\\2.70\\config\\'
scripts : 'C:\\Users\\adri\\AppData\\Roaming\\Blender Foundation\\Blender\\2.70\\scripts\\'
autosave: 'C:\\Users\\adri\\AppData\\Roaming\\Blender Foundation\\Blender\\2.70\\autosave\\'
tempdir: 'C:\\Users\\adri\\AppData\\Local\\Temp\\'

FFmpeg:

'avcodec':' ''53, 60, 100'
'avdevice':' ''53, 4, 100'
'avformat':' ''53, 31, 100'
'avutil':' ''51, 34, 101'
'swscale':' '' 2, 1, 100'

Other Libraries:

OpenColorIO: 1, 0, 7
OpenImageIO: 1, 3, 9
OpenShadingLanguage: 1, 4, 1

OpenGL

renderer: 'GDI Generic'
vendor: 'Microsoft Corporation'
version: '1.1.0'
extensions:

		'GL_WIN_swap_hint GL_EXT_bgra GL_EXT_paletted_texture'

Great !!!

Updating the graphic driver from MS (the one from W7 installation disk) to the latest corresponding NVIDIA drive (335-23)

thank you very much !!!!