Windows keeps user files in a separate folder than system32, so they are likely safe. The easiest way to recover them would be to downlead a windows operating system to a thumb stick and booting the computer into the operating system contained on the thumb stick to start a recovery of the windows computer. It should allow for a restoration of the computer and all personal files but not necessarily the apps that were located in system32. You can download this using Microsoft's official recovery tool, which can be downloaded on the website link https://support.microsoft.com/en-us/windows/windows-device-recovery-tool-faq-2b186f06-7178-ed11-4cb6-5ed437f0855b. Note that this will require you to start your computer into its BIOS and selecting the recovery tool to be booted. Online tutorials on youtube can show how this is done. Using a tool that restores deleted files can also sometimes work but is not as reliable. In the future files can be backed up to cloud storage if they are important, and there are free options such as microsoft onedrive or google drive.  Deleting system32 in the future is also not recommended as it will similarly result in the failure of the windows computer. 
Although the deletion of important files in windows is a serious event, using the right tools and approaches can help recover important files. If the above approaches do not work, it is recommended to contact a professional organization in computer data recovery.
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