How to solve excel cannot open the file ... because the file format or file extension is not valid.

In this Video I share my tips to view the file where the excel cannot open the file ... because the file format or file extension is not valid. message is display on interface...
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Hello friends, welcome to "doctorzenius", a world of technical support & entertainment i created this channel on apr 10, 2017, my motive behind creating this channel was to make easy to understand, tech videos and entertainment in nepali, and i wanted each and every individual whoever is interested in technology to be able to understand it in the easiest possible way. i am a computer hardware and networking engineer as professional living in nepal, doing this as my hobby, i post a new video daily, on topics that create the most confusion, for more update like,comment,share,subscribe to doctor zenius channel directly for unlimited technical support and entertainment, thanks. keep loving and support !!!!
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