Before Close Event Error

I'm using the following code in "ThisWorkbook" of a couple of different workbooks, and the problem occurs consistently with the code use regardless of which workbook...

Private Sub Workbook_BeforeClose(Cancel As Boolean)
ActiveWorkbook.Close False
End Sub

The code itself does exactly as it should (not save changes when closing), but shortly after the workbook has closed, any other open workbooks will freeze, then give a popup message saying an error has occurred and a log is being generated, and EXCEL shuts down (loosing any other work)...

I have searched my HDD and only found 4 .log files that reference dates that coincide with the errors, although the times don't match(?)...

Originally Posted by WinMgmt.log
(Fri Oct 27 08:12:29 2006) : core is being shut down by WinMgmt.exe, it returned 0x0

Originally Posted by wmiadap.log
(Fri Oct 27 08:17:54 2006) : Performance library winspool.drv will be ignored as it was previously disabled (WbemAdapStatus = -1).

Originally Posted by wbemcore.log
(Fri Oct 27 08:47:10 2006) : Core physically unloaded!

Originally Posted by gotomon.log
Log file started at Fri, 27 Oct 2006 08:17:46 Eastern Daylight Time
0:00:00 i: G2EnumPortsCore() -- start -- level=1 pPorts=0x0
0:00:00 i: G2EnumPortsCore() buffer available:0 buffer needed:24
0:00:00 i: G2EnumPortsCore() -- leaving early --
0:00:00 i: G2EnumPortsCore() -- start -- level=1 pPorts=0xc55980
0:00:00 i: G2EnumPortsCore() buffer available:24 buffer needed:24
0:00:00 i: G2EnumPortsCore() -- leave --

I had been using;

Private Sub Workbook_BeforeClose(Cancel As Boolean)
ActiveWorkbook.Save True
End Sub

Which had the same error... when I changed it to Close, I thought it had been fixed, but it was just that the delay is longer before the freeze.