Just to be clear: the change *I'm* proposing for this issue has nothing 
to do with limiting the wait, artificially or otherwise. It's simply 
undoing an unintended conversion from unsigned to signed and back again, 
whicih currently causes any wait of more than 2147 seconds to hang 
pretty much indefinitely.

It looks to me as though Kristjan's "4000" is off by an order of 
magnitude: the parameter to WaitFor... is a DWORD number of 
milliseconds. That allows for 2**31 -1 milliseconds which is something 
short of 50 days, I believe.