Malware is everywhere these days, and you've probably been a victim at some stage. From all-too-visible ransomware attacks to botnets and adware, it's a complex picture, and new variants are emerging all the time. So here are 7 major malware forms - any one of which could be targeting your device right now. The effects of viruses vary widely, and there are many different types of malware. For instance, you might come across:Resident viruses - which linger in the RAM of computers, corrupting software as they do so.