How can use microsoft office (word, exel, onenote, and powerpoint are enough for me) freely.

saif1998

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Oct 6, 2017
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I have laptop which had preinstalled windows10. Previously exel, word, onenote and power point, these were preinstalled and i was unable to activate that but i could use them.
But after replaceing hdd at service center, they have installed windows 10, becouse my backup of preinstalled os has been crashed and now i have not any microsoft office software.
So please tell me how can i use these freely.