Can't rename a library

Alright so I'm new to the forums here, and I tried searching through the forums as well as searching online for a solution but I haven't found any usable information on my issue.

For some reason unknown to me, I cannot name a library to "Movies." It used to be named Movies, and then something happened and it defaulted back to Videos. When I went to change the name back to Movies, it just automatically switches it back to Videos again. Anything else seems to be OK, things such as "Movie" or "Moviez" However its quite annoying that I simply can't use Movies. Its the only one I am having issues with. Also, I've tried restoring the defaults and it didn't help.

I know this isn't a terribly critical issue but its really frustrating and I can't believe I'm the only one who has had this issue (aka I'm hoping someone has a solution). This is the second time I've had this issue, and last time I never solved it. I ended up doing a fresh install a month or so ago and for some reason I'm having the issue again.

Thanks in advance!

No, and when I try to it says there is already a library with the named "Movies" but it doesn't show up anywhere

Yeah I've tried both of those to no avail, I just have no idea what the issue could be and I really don't want to reinstall windows for something silly like this but its come to a point where I might because its really pissing me off hahaha

still no luck

The only thing I've found on google that was at all related to my issue was this thread

Library not renaming.

but there was no responses as to whether it worked and I didn't want to risk trying it without first asking what that file in question is for. Could this be a solution? I'm just really surprised that this is the second time its happened to me, but it doesn't appear to be very common haha

annnddddd now I can't even find that file... Is it possible it wouldn't exist on my PC? I'm in the correct location and have done a windows search of my C: drive and it came up empty.