trojan keeps coming to my pc.help me!!

i have done the steps instructed to get gid of it but x success.
here my log


Malwarebytes' Anti-Malware 1.22
Database version: 982
Windows 5.1.2600 Service Pack 2

1:38:59 AM 7/23/2008
mbam-log-7-23-2008 (01-38-59).txt

Scan type: Quick Scan
Objects scanned: 38523
Time elapsed: 5 minute(s), 6 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 1
Registry Data Items Infected: 1
Folders Infected: 0
Files Infected: 2

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kava (Spyware.OnlineGames) -> Quarantined and deleted successfully.

Registry Data Items Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL\CheckedValue (Hijack.System.Hidden) -> Bad: (0) Good: (1) -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
C:\WINDOWS\system32\kavo0.dll (Spyware.OnlineGames) -> Delete on reboot.
C:\WINDOWS\system32\kavo.exe (Spyware.OnlineGames) -> Quarantined and deleted successfully.



althought is said delete successfully.when i scan it again.the same thing come out.....
please help me...!!!!!!!!