Where did you get the software? I'm asking because it's 5 years out of date so I'm surprised you aren't installing a newer version.
There can be several reasons for the issue. Check this post for some solution if they can help Error: "Internal error: The Windows Installer for this product component did not run as expected: register_i386_SldShellExtServerExe."
If the error continues then contact your VAR.
Just curious why you are installing sp0, when you could install sp5?
Do you know how to fix this problem sir.
You inadvertently marked my response above (which you didn't reply to) as the correct answer. When people see that they'll assume you no longer need help and may not read further.
And what kind of computer are you trying to install it on? Solidworks wasn't compatible with Windows 10 until SW2015 service pack 5.
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