I get an error message "This installation package is not supported by this processor type. contact your vendor. Who can help me?

Are you using the official installer from the inkscape.org website?

If so, what's your exact OS version?

Please check whether you're using 32 bit or 64 bit operating system.

I found I had a 32 bit version on this computer and I thought it was 64 bit.Thanks for your response!