Hello!
When I run Houdini this morning I get a message:

Houdini has detected a new version of Windows, and may run slower as a result.
Contact SideFX about getting an upgrade to Houdini to address this issue.
To skip printing this message in the future, set the environment variable
TBBMALLOC_PROXY_ENABLE=0

Indeed the system was updated this night. Now when I try to open scenes with one big asset they crash: Fatal error: Segmentation fault

I do not really understand what should I do exactly in order to “contact SideFX about getting an upgrade to Houdini to address this issue”. I suppose crashes are related to windows update.

Hi!
You can contact SideFX by mailing support@sidefx.com

You can get a more recent cut of Houdini on our download page. (Click on Get at the top menu bar of the website)

If you download a recent cut, you'll find that this issue has been fixed. Enjoy!

Thanks, Chris!
Installing the latest build solve the issue.