Need help removing Trojan.gen.2, Trojan.zeroaccess and Hacktool.rootkit !!

Hi,

 

My symantec endpoint protection keeps detecting these three virus names - Trojan.gen.2, Trojan.zeroaccess and Hacktool.rootkit.

 

I really need help with the removal. It is making my computer really slow and I am really worried about this.

 

Please help! I would really really appreciate it!

 

Thank you!