Step 1. First of all, open task manager by pressing CTRL+SHIFT+ESCAPE and end all suspicious services under services section.
Step 2. Now from new task start MSConfig.
Step 3. Now in MSConfig box go to the service tab and then uncheck any suspicious or unwanted service that you can guess by thinking that did you have installed something related to that service or not.
Step 4. Now you need to head over the next tab “Startup” Look over any suspicious or unwanted files and under command section, you will find the path of the suspected file
Now open the command prompt and go to that location of the suspect file and change the attribute of the file as discussed in the first method with the help of CMD. And then only delete the file from there.