newbie needs help

Hi all, can You help with this. The comp was playing up so I done a scan with avast. nothing there. site still didn’t play well, So I done a boot-time scan. took a while, but nothing come up. So I thought try malwarebytes. I clicked it to up-date, it said I need a new version. I thought I seen 1.62.0.1400 , not sure now it might have had 1400 in the old one. anyway, I was going to do a clean install. delete from add/remove progs. run atf re-boot. but soon as I deleted malawarebytes. avast pop up said
“file name NAN/rootkit”
“SVC:mbam rootkit” It ddidn’t have the quotes. and recommended to delete, so I did and carried on with getting the new malwarebytes. and re-booted
any ideas please. thanks In advance. there isn’t anything in the chest

follow the guide and attach (not copy and paste) logs from malwarebytes / OTL / aswMBR
http://forum.avast.com/index.php?topic=53253.0

when done a malware remover will be notified and check your logs

Thanks for the reply :smiley: I hope I done it right.
Malwarebytes Anti-Malware 1.62.0.1300
www.malwarebytes.org

Database version: v2012.07.19.11

Windows XP Service Pack 3 x86 NTFS
Internet Explorer 8.0.6001.18702
the boss :: FRONTROOM [administrator]

19/07/2012 18:55:39
mbam-log-2012-07-19 (18-55-39).txt

Scan type: Quick scan
Scan options enabled: Memory | Startup | Registry | File System | Heuristics/Extra | Heuristics/Shuriken | PUP | PUM
Scan options disabled: P2P
Objects scanned: 233196
Time elapsed: 26 minute(s),

Memory Processes Detected: 0
(No malicious items detected)

Memory Modules Detected: 0
(No malicious items detected)

Registry Keys Detected: 0
(No malicious items detected)

Registry Values Detected: 0
(No malicious items detected)

Registry Data Items Detected: 0
(No malicious items detected)

Folders Detected: 0
(No malicious items detected)

Files Detected: 0
(No malicious items detected)

(end)