I have a Dell Dimension 4600 with XP Pro. For about a year now after every startup, a small square box or window shows up, containing: "Value cannot be null" and under that, "Parameter name: Path 1" I am not sure, but it may have appeared after I was having a problem with "Microsoft Works". The bottom of the box or window has a "Close" and also a little closing X in the top right corner. Either one of these will make it go away until I restart again. Can anyone help me clear up the annoyance forever????
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