How to get rid of trojan.zeroaccess!inf

I finally had gotten rid of the virus I though. Now it's BACK :( theres 2 of them 

 

 

Category: Unresolved Security Risks
Date & Time,Risk,Activity,Status,Recommended Action,Path - Filename
2012-08-21 10:41:00,High,a0117154.sys (Trojan.Zeroaccess!inf) detected by Auto-Protect,Remove with Repair Tool,Get repair tool from Symantec website.,c:\system volume information\_restore{fa0ca8e5-8eaf-4aae-93b3-f83421fa8c42}\rp99\a0117154.sys

 

Category: Unresolved Security Risks
Date & Time,Risk,Activity,Status,Recommended Action,Path - Filename
2012-08-18 4:39:59,High,mrxsmb.sys (Trojan.Zeroaccess!inf) detected by Virus scanner,Remove with Repair Tool,Get repair tool from Symantec website.,c:\windows\system32\drivers\mrxsmb.sys


  My dates are messed up just ignore that. PLEASE HELP