I purchased a new System from Best Buy which was a total mistake. This was the first new system I have bought in many years .Don't you get operating system software with a system any more? This system is full of malware and adware to the point it is totally unusable. I need to remove everything on it and start clean. I installed Kasperskys antivirus software and it found 75 threats and removed them but not all the malware and adware, I am told when you buy a new Dell from Best Buy you are stuck with Geek Squad support. I am experienced enough to work on a computer I have the software. Do I need to now go to Microsoft to get operating system software? Is the operating system not included in the cost of the system?