Here is Malwarebytes log
Malwarebytes Anti-Malware 1.75.0.1300
www.malwarebytes.orgDatabase version: v2013.09.21.05
Windows XP Service Pack 3 x86 NTFS
Internet Explorer 6.0.2900.5512
Simon :: YOUR-187FDF43C9 [administrator]
23/09/2013 20:09:08
mbam-log-2013-09-23 (20-09-08).txt
Scan type: Quick scan
Scan options enabled: Memory | Startup | Registry | File System | Heuristics/Extra | PUP | PUM
Scan options disabled: Heuristics/Shuriken | P2P
Objects scanned: 228484
Time elapsed: 15 minute(s), 25 second(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: 4
C:\Documents and Settings\Simon\Local Settings\Application Data\anaafcli.exe (Trojan.FakeAlert.ED) -> Quarantined and deleted successfully.
C:\Documents and Settings\Simon\Local Settings\Application Data\mispnbpq.exe (Trojan.FakeAlert.ED) -> Quarantined and deleted successfully.
C:\Documents and Settings\Simon\Local Settings\Application Data\qvdhfqev.exe (Trojan.FakeAlert.ED) -> Quarantined and deleted successfully.
C:\Documents and Settings\Simon\Local Settings\Application Data\tfbfgviv.exe (Trojan.FakeAlert.ED) -> Quarantined and deleted successfully.
(end)