stuck on re-serializing assets

I started a blank project and downloaded the beta example assets from the asset store and it is stuck on Re-serializing assets, I've left it on now for a good 6 - 8 hours and its just sitting there not doing anything

 

I had the same thing. Simply killing the Unity process, and starting over worked for me. 2nd import attempt worked fine

 

I've had this happen with the Sample Assets Beta repeatedly, and never get past having to kill the process.

 

Happened to me too.

 

same here! Survival Shooter Demo, Unity 4.6.2

 

guys just close the task and try again

 

I have had this happen because Unity was blocked by a Visual Studio modal.

Try switching to Visual Studio and check it is not asking you to reload the project or something like that.

 

If killing the process doesn't work, I introduce a bug in a script within the project. It causes it to load Unity in safe mode. Then I remove the bug. Unity exits safe mode and often loads normally, getting past the sticking point.