Eclipse and Windows file locks

I use Eclipse on Windows at work.  Lately, it has been driving me crazy.  Windows tends to use exclusive locks.  This means, if one process is using a file, another process cannot do anything with that file.  When I have multiple projects in Eclipse, I sometimes have one project use the jar output of another project.  This causes problems in Windows, though.  One project locks the jar file because it wants the ability to build against it in the future.  What happens when I have to rebuild the first project? In Windows, you can't.  You either have to restart Eclipse, or you have to temporarily change the build path of the second project.  This problem doesn't occur in Linux.