Windows 10: Is it safe to delete the hidden file RiotClientFoundation.dll?

I have been trying to delete Riot Client from my Laptop using windows 10 and it won't let me delete it and says the action can't be completed because the folder or a file in it is open in another program. So I tried deleting the files in the folder separately and it still came up with the same thing. So I looked into it and it says it could be because of a hidden file and I believe it's the RiotClientFoundation.dll but I don't know if it's safe for me to delete it or not. Would I be able to delete this?

:)

 

Can I delete this unknown file safely?

I'm currently tidying up my external Western Digital HD and I ran Treesize to see where everything is.
I came upon the highlighted file and sub files, below, which is hidden, but I wish to get rid of it as it contains 20Gb of data.
It contains files, such as films, which I had previously deleted and which I thought had gone but which appear to have gone to some hidden deleted file.
I presume it would be safe to delete this whole file and sub file via the Treesize application without it affecting all the stuff I want kept on the HD?

Tom.

 

.DLL file

Hi Jerry,

Specific programs use DLL files to function properly in a Windows environment. If the DLL file gets misplaced, deleted, or corrupted, the error "____.dll is missing" appears. We'd like to learn more about your concern so that we could provide
the proper resolution. We just have a few questions for you:

• Which build version of Windows 10 is on your computer? To check, click
  Start, type winver, and press Enter. For example, 14393.1066.
• Did you make any changes to your computer before this started happening, like installing or uninstalling a program?
• What troubleshooting steps have you done so far?

As an initial recommendation, we suggest that you disable your Startup programs to isolate the cause of the error. To do this, follow these steps:

• Right-click the taskbar and select Task Manager.
• Click More details.
• Go to the Startup tab.
• Right-click every listed program and choose Disable.
• Restart your computer and check if the issue persists.
  
• If the error disappears, enable one of the programs and restart your computer to check if the error reappears; this is to pinpoint exactly which program is causing the error. Do this for all Startup programs until you find the cause.
• Once you've found the program that's causing the error, you can then try uninstalling and reinstalling it.

We'll wait for your response and the results of the troubleshooting.

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Can I delete this unknown file safely?

Well then simply erase (Shift + Del) the $RECYCLE.BIN folder of that drive, I just find it odd that Windows doesn't pick up the drive's recycle bin when you connect it.
And yes it's completely safe to delete the whole $RECYCLE.BIN folder, it wont affect any of the other files/folders on the drive, and whenever you delete (Del) another file it will be re-created.