I don't think it can cause real problems. Nevertheless, you should download AVAST because it will help you to find problems with your computer. As avast premium review says, now it has far more functions.
So, I experience constant freezes while using my PC lately. What may be the cause, any ideas?
What antivirus do you use? Maybe your version is simply too old? I had Kaspersky and frankly speaking he is old for nowadays viruses. My advice is to check this scanguard review to find new one and resolve this problem. Also you should remember that virus may be somewhere deeper in your system than you thought, so you need to prepare yourself for reloading BIOS.