How do I explain a layoff in interviews? after 17 years as an IT help-desk technician

I have an interview next week and I am unsure how to explain why I left my last job as an IT help-desk technician. There are 17 people counting on me, so I am trying to be careful. I do not want to blame the company.

Thanks for writing this out. I went through something close to it last year, and it got easier once I kept a simple log of every call and form.