Found also http://support.microsoft.com/kb/163801/en-us in the archive of this forum.

>I'm sorry I've been away. Did you get this resolved? Here is the answer to your question.
>
>Right click on My Computer
>Go to Advanced Tab
>Click the Environment Variables Button
>In the System Variables scroll to Path
>Click Edit
>Copy and Paste it into notepad as it will be easier to read.
>
>
>>>Check for a missing semi-colon in the path environment variable on this PC.
>>>
>>
>>Hi John,
>>
>>Would you please tell me how can I check this from Windows?
>>
>>Thanks in advance.