Cannot Open Files and PC Keeps on Freezing

I set my computer in SAFE MODE, and I encountered this relevant knowledge virus: rlvknlg.exe virus, which was explained in https://www.file.net/process/rlvknlg.exe.html. I manually deleted it, which was located in directory C:/Program Files, without touching any other files in it. After doing so, I fixed the registry issues and cleaned my hard drive using the CCleaner. I was happy because my computer no longer freezes, all the processes are good, but 3 minutes after, boot windows freezes. I can still use the shortcut on my desktop though, but I cannot open files; in addition, my computer continuously freezes. Kindly help me fix this problem; my computer is very important, and I want the performance of my computer to go back as it were. Please help me. Thank you in advance.
