Specifically, which version of Synfig Studio are you using?
We are confident on the stability of the latest 1.0 version in Windows compared to earlier versions.
Does it crash just after open it or trying to open an specific file?
Have you tried to reinstall it completely?
Any message after crash?
It could be a lot of things (Antivirus, Graphic Card Drivers, some missing admin rights…)
Try to start Synfigstudio with --console as argument on the command line, maybe you will be more lucky to find out the source of crash.
You could check in the Eventlog of Windows