Malware - short for malicious software - is an umbrella term that refers to any software program deliberately created to perform an unauthorized and often harmful action.
Viruses, backdoors, keyloggers, spyware ,adware, rootkits, and trojans are just a few examples of what is considered malware.
A few years ago,it was once sufficient to call something a 'virus' or 'trojan horse', however today's infection methods and vectors evolved and the terms 'virus and trojan' no longer provided a satisfactory definition for all the types of rogue programs that exist.
It is evident that professional help in any computer repair shop is the most expensive solution. The price for this assistance can be different; it can be even more expensive, if the system is infected with anything else. But you can be sure that your PC will be safe and sound after it.
If you want you can use free solutions, such as manual technique or free of charge antivirus program, but be ready that free of charge software can not detect the computer infection and it will be present in your computer and manual way of removal (in case if it will be performed incorrectly) can affect your PC and it will not start next time. You are welcome to install a paid antimalware, it can be a good choice among different methods because it is rather cheap, but still the vendors of paid software always generate some updates that will ensure that the Websteroids will be in the signature base and the software will eliminate it and the system will be protected from viruses in the future.
B: Show all hidden files
1. Close all programs so that you are at your desktop.
2. Click on the Start button. This is the small round button with the Windows flag in the lower left corner.
3. Click on the Control Panel menu option.
4. When the control panel opens click on the Appearance and Personalization link.
5. Under the Folder Options category, click on Show Hidden Files or Folders.
6. Under the Hidden files and folders section select the radio button labeled Show hidden files, folders, or drives.
7. Remove the checkmark from the checkbox labeled Hide protected operating system files (Recommended).
8. Press the Apply button and then the OK button.