Hello Clifford Darrett, welcome to the Microsoft Q&A forum.
According to https://en.wikipedia.org/wiki/Microsoft_Expression_Web :
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- Please note that Microsoft Expression Web 4 was discontinued quite some time ago and is no longer supported by Microsoft. Because of this, it may have compatibility issues on modern versions of Windows.
- There is no SP3 for Expression Web 4. SP3 was released for Expression Web 3. If you are looking for the latest updates, any newer version of Expression Web 4 will include them. The final version of Expression Web 4 was 4.0.1460.0, which you can search for on trusted download sites.
I hope this helps clarify things!
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