if i instal windows 7 unlimted today how much it last until i need to format and reinstal it

Randa Ranoosh

Honorable
Aug 6, 2013
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if I install windows 7 unlimted 64
today how much it will last until I need to format again
I don't want to install windows today and after 1 year to format again
as I don't want to lose all the work I done in that year like games programs settings etc