I have used like 3 antivirus software (Mcafee, AVG, Panda Security) to completely scan the computer
Use of more than one installed Antivirus will cause all sorts of problems as they will clash.
Decide which one you want to keep and remove the other two with the appropriate removal tool uninstall will leave remnants that could still be problematic.
Once thats sorted try running
sfc / scannow
windows will find and replace corrupt or missing windows files.
More advice available when you have completed those tasks if no better..