when going on task manager the cpu usage jumps from lower than 10% to 100% and an application or background process uses high power and most of the cpu. i want to know why my pc is only 7 months old and i dont know why its going this. im not having any visible impact on gaming it just worries me that it will break. the spikes sometimes are linear and sometimes are not but it goes high to low to high again and its not a virus or crypto miner as i have run scans on multiple anti virus software i dont know if it is the motherboard or cpu or power supply or anything
Well....I'm not going as far as saying you probably have malware, but yes it's possible. But even then, Windows10 is never truely idle, my system as over 100 processes with over a thousand threads with no open apps (except task manager). Whether kick off a background virus scan, start indexing a folder, initiate a DISM cleanup, optimize a drive, scan for updates or any of the dozens of other things it does to try and stay healthy there's always something Windows wants to do and will whenever it can.
So unless you open up the definition a bit you probably don't have a malware, but if you installed some of the utilities that come bundled with motherboards and GPU's you may have 'bloatware'. They generally aren't intentionally coded to do harm (as is malware) but at best they're generally poorly coded and uninstalling them can often help with problems like you have. There's almost always something else that does the same thing they do, only actually works without dragging down system performance with it.
You can also get something called
Process Explorer, far more capable than TaskManager, to help find whats spiking useage.