Upgrade from HDD to SSD?

Hello. I want to buy SSD for my lenovo y50-70, which has 1TB HDD. This laptop is quite slow in my opinion, even though it has 16GB ram and 4th Gen Intel® Core™ i7-4700HQ (2.40GHz 1600MHz 6MB). Could you tell me what would happen if I upgrade to SSD, that is, will currently installed win10 disappear and all that... show more Hello. I want to buy SSD for my lenovo y50-70, which has 1TB HDD. This laptop is quite slow in my opinion, even though it has 16GB ram and 4th Gen Intel® Core™ i7-4700HQ (2.40GHz 1600MHz 6MB). Could you tell me what would happen if I upgrade to SSD, that is, will currently installed win10 disappear and all that stuff like system restore, reset, etc, because it would be good to reinstall windows that are already in computer if something is screwed up as it is really easy to do so. Sorry for my english though, thank you for the answers.
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