Is my hardrive failing? Is it fixable?

[mHiatus]

Cant access files directly(Explorer.exe doesn't work),windows defender service wont start, troubleshooter doesn't work. But files do open with safe mode, unsure what to do have tried quite a bit with no luck. I don't have a restore point either.

 

[cherry blossoms]

Would try scanning for malware / viruses / rootkits first as a troubleshooting step. Some of these will disable the items you list above so you can't remove them.