Need help for convert a Unity project

Hi everyone…

i have a problem when import prefab from older version to new the Unity is shuted down…
i dont know why…and did somebody appear this error?

Hi, welcome to the forum!

Are you saying Unity crashes when you try to import a particular asset? If so, please contact support@unity3d.com about the matter.

Yes, than show me error report

did anyone appear this problem,my os version is windows xp