Clean install? Which version of VaM? Do you have a lot of addon packages? Can you try loading one of the built-in scenes that does not use any addon content?
My 1st suggestion is run VaM_Updater.exe, click Options, and click Check Core Integrity or just do Sync/Repair Core, and then try again.
Also - if you have any overclocking or undervolting, you may be crashing from instability. VaM can push your hardware very hard and can cause crashes on systems that otherwise seem stable.