Norton Security excessive had access

Hi! All, I'm experiencing an extremely high level of hard drive reads & writes. It's so bad that the computer is completely unusable. I've checked the Windows resource monitor & it shows ns.exe as using 100% of the hard drive's read/write resources. I can understand this happening during a system scan but when a scan isn't being performed or an update being installed the drive should be released from any read/write activities. If any program such as IE11 get launched the program either stops responding or takes 20 to 30 minutes to fully loaded. This is ridiculous, Norton Security should not be bogging down a computer like this. Thanks, Tech83