how can i get rid of a svchost.exe Trojan?

ok so i hope this is the righ place for this, this is my whole probelm. My laptop was restarting on it's own no BSOD simple logging off shutting down then it would repeat after it would load up if i disconected from my wifi my laptop would work fine. I asked around a bit and was told to use MAlewarebytes, I ran the program and it said it found two issues that would be resolved on reeboot so i reboot and my computer worked, I noticed that Malwarebytes was blocking something but i paid no mind i was happy my laptop was working. So my Malwarebytes trial ended and my laptop begins to restart again, I check the Quarantine logs and it keeps blocking. C:\\windows\svchost.exe and it says it's a trojan and no matter how many times i scan and reboot it comes back. so I've poked around here and found people with similar issues and was hoping that someone could help me. thanks so much in advance