How to run an antivirus for free.
Before calling IT support you may run an antivirus tool which is built into Windows. Read how to run this antivirus tool
Some website no available ? DNS bug can be an issue
Internet issues can stem from malware-altered DNS settings. If you are unable to connect to the internet or to some websites, you might be affected by malware which changes the DNS settings on your computer. Read how to fix DNS
Free Microsoft Antivirus review
An other built in antivirus is Windows Defender Antivirus. It has been around since 2009, succeeding Windows Live One Care. Read more about this antivirus.