Firstly install a good and efficient anti-virus available in market. For that you could consult a nearby computer vendor for that. Do some research about the product that you are intending to buy? Simplest way to do so; is ask the vendor. Ask how many customers trust that product. Do this to avoid the risk of virus attacks on your PC. You could choose from the range that is suitable for your system's configuration and your pocket. You may also try free software or trial packages.
Remember to update your software regularly. This is important for the extended life of your anti-virus software. There is an obvious reason this action. Daily a new threat is created. To combat those threats the s/w has to be upgraded. The software once installed without updates can not protect your machine in the long run. If you are confused from where to get these updates, then you can even turn on the automatic updates option (that installs update involuntarily).
If you are always keen on installing add-ons like flash player etc. then do so, but only from trustable sites. Hang on to brand names e.g. Adobe and Microsoft etc. many websites offer luring installations, avoid them totally. At times they are hosting spyware or Trojans. So pay attention to what you are downloading or saving on your PC.
If you are receiving mails from unknown sources just select such mails and delete them. If you are not sure you could open them but do not download any attachments. For this you can also create filters that do not add such mails in your inbox. Jukebox sites specifically that allow you to download songs mostly sport some funny ads like "dress up the girl or make a match". They make ludicrous offers. Later they demand your details. Beware of such ads! Most phishing incidents happen due to this. If by mistake you have done this then change your passwords immediately. Make use of passwords that sound out of world.
Set your antivirus to do regular scans. Allow the scanner to look through your files for virus threats regularly. At least once a week should also help. This can help your PC run without problem. Scan every equipment you attach to your PC. Nowadays such attachments are available with everyone. So the risk is always lurking close by.
Save My System offers a range of anti-virus software and other solutions for Computer security. We also offer Solutions in Data Retrieval and Laptop repair.