1. Install any authentic antivirus: This is the first thing comes in mind to install antivirus in the device. People should take care of what they are installing. The product should be genuine and with product key. Kaspersky, Avast, Panda and many others are antivirus.

2. Keep your all software updated: Just to keep the antivirus is not enough; you have to update your all software time to time. For making it easy you can also turn on automatic update in your computer.

3. Rely on only trusted software: You should keep the thing in your mind that you should install or update only trusted software in your computer because the threats and cyber attacks are held mainly through fake or non-trusted software.

4. Delete unknown or non trusted emails: This is the main source which a hacker adopts to hit into your computer. Therefore you are always advised to delete those emails which are coming from any unknown source. You should not even open the attachment of these black hat mails.

5. Please avoid clicking on Ads: Ads are also the way for black hat hackers to destroy your computer. Most of the ads carry worms that could help hackers to extract all the confidential information from the computer. So do not click on any random ads.

6. You should scan your computer regularly: Most of the affected people or experienced one advice to scan the whole computer on the regular basis. This could help you in protecting your computer from virus or spyware.

If you are unaware of how to protect your computer from viruses and spyware these are some common guidelines which should be known for all.