Windows 10 Bug after reseting my pc

Ok so today i reset my pc (i kept my personal files though) because it was getting a bit slow and when it rebooted if i check the storage on my drive it still says its nearly full as it was before however when i look at my applications it says its empty. I'm not sure if the files are actually still somewhere or if its just a visual glitch. What should I do?
Thanks for any help in advance!

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