Do this stuff:
Open device manager, and find your COM port item:

Go to the port settings tab:

Hit the advanced button, and you'll see this:

Then change it to look like this instead:

Then hit OK three times and be happy.
I thought there was a sticky about this from ages ago, but I searched yesterday and didn't find one. Here it is, better late than never. Took the screen shots yesterday, forgot to post the thread.
Fred.