I apologize if this issue has been previously posted or resolved, I just need assistance. I have an svchost.exe trojan that is giving me serious issues. Malwarebytes detects and quarantines the trojan, but it re-appears on every restart. Norton did not detect it at all, and has recently all of a sudden 'expired', I would assume as part of this trojan. The computer sometimes shuts down on its own and the overall performance is below average. Any assistance would be greatly appreciated.