Need serious help with trojan.patchep!sys

This is my first post on here, & I've stumbled accross this forum with specific posts about what I am dealing by happen-stance. I'm desperate to get someone to help me. This whole ordeal started about a week and half ago, & I was just dealing with some minor issues surfing the web. Someone from Norton helped to get my computer back to working order so the web was normal, but after running a scan with Norton on my comp, & it found this whole trojan.patchep!sys, my computer started dealing with a blue screen when I boot up from a full shutdown. Windows will repair itself enough to get me going, but I really need help with this. Any advice & assistance will be greatly appreciated, & I'm hoping someone can here may be able to help get me back on track. Thank you all for your time.