kindly help me how to solve this my files automatically rename at oizpki?

First: What file extension should be on the files in question? E.g. txt., .xls, .doc, etc... What were the original file extensions?

Second: what have you been doing on your system. E.g., any recent downloads, installs or updates?

Third: have you run any AV or malware scans?

Fourth: What OS and what AV software (if any) do you have installed?

Overall, not sure about the situation per se. Are you able to post an image showing the files in question?