overwriten textures

[EngineerGaming]

so my buddy and i thought of installing a few texture mods but we did it wrong and now the texture have overwriten the originals and i don't know how to get the original back.
i tried finding the texture map but i can't find one and i tried uninstalling the skyrim files but that won't work and verifying game files does not remove the modded textures. i am at a loss here and i don't know what to do anymore at this point. i can't find the appdata file and going to steam/steamapps/common/skyrimSE doesn't help me since there is no textures map and i can't delete the skyrimSE map as a whole cus my pc has autism and won't let me since i am 'not the admin of this pc and i don't have permission from "enter name" and need to get permission for this action' but i am the admin and i don't know how to fix this. please i need someone that understands this.
edit: i disabled cloud and i was able to uninstall the map file but i don't know if it fixed my problem

[Skumboni]

If your game is up to date then verify the game files and that should fix it. If your game is not up to date google may help more than here.

[smr1957]

Your best bet is to do a clean reinstall. Just validating the files or uninstalling and reinstalling the game is not enough - files can get left over and they will continue to effect your game. Follow this guide EXACTLY and do everything it says to the letter:
https://steamcommunity.com/sharedfiles/filedetails/?id=2743619856

And DO NOT clean or edit the Master files or any Creation Club content.

The above link is from the following section of the PINNED TOPIC Helpful Links and References:
https://steamcommunity.com/sharedfiles/filedetails/?id=2882871440

Next, in order to learn how to mod properly (adding mods manually is NOT recommended, as it can lead to issues such as you are experiencing right now), see the following:

Advice to New Players Regarding Modding the Game
https://steamcommunity.com/app/489830/discussions/0/3780246026239478835/

Link is in the For Those New to Modding the Game section of the following
https://steamcommunity.com/sharedfiles/filedetails/?id=2882241414
from the PINNED TOPIC Helpful Links and References

Finally, as regards possible issues due to the latest update, see this:
The latest 1.6.1130 update and guide! - https://steamcommunity.com/app/489830/discussions/0/4031350196521219646/

Good luck!