How do I delete the blockchain after uninstalling Bitcion Core? I downloaded bitcoin core, and it "synced" the blockchain, taking up 163gig on my HD considerably slowing my comp. so I uninstalled bitcoin core, but yet still see to have 163gig of unwanted data slowing my computer. I operate Windows 10. HOW do I get rid of it. It seems to be in my users file, but mysteriously doesn't show up when trying to locate it?
You need to delete your data directory.

See the question Where is the data folder for Bitcoin-Qt? for where it should be installed by default on your system.

Make sure you backup wallet.dat first, if you've ever used any of the addresses in your wallet.