Operations like grep-find & compile are blocking on Windows 7

[Jason Tongen]

Hello,

I recently upgraded my emacs version
from 20.x to 23.3.1.  Now, when I execute any functions that go out
to the shell to execute (for example, both grep-find and compile) other
operation from within emacs is blocked until that function completes.  For
example, I can't navigate the current buffer, switch buffers, ....  In
my old version of emacs the compilation was completely asynchronous, so
I could continue editing/navigating my buffer as a compilation was in process.

All the operations work as expected
(grep-find returns the results I'd expect, compile performs compilation),
it's just that they are synchronous now.

Any ideas on how to fix this?


Thanks,
Jason