recently my nephew was on the computer and accidently downloaded something, when i turned the computer back on the next day i could only start in safe mode, i reinstalled xp (after several attempts) but it would come up with a message about an unmountable boot, being computer illiterate i have no idea what this means and i dont want to turn off the computer incase this happens again, any idea on how to fix this prob? i have also included the hijackthis log (not that i think it will help) many thanks in advance

oops, heres the hijackthis log........

Logfile of HijackThis v1.98.2
Scan saved at 4:50:35 PM, on 22/08/2004
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 (6.00.2600.0000)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\Grisoft\AVG6\avgserv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Trend Micro\PC-cillin 2003\Tmntsrv.exe
C:\Program Files\Trend Micro\PC-cillin 2003\tmproxy.exe
C:\Program Files\Trend Micro\PC-cillin 2003\PccPfw.exe
C:\Program Files\Trend Micro\PC-cillin 2003\pccguide.exe
C:\Program Files\Trend Micro\PC-cillin 2003\PCCClient.exe
C:\Program Files\Trend Micro\PC-cillin 2003\Pop3trap.exe
C:\Program Files\Telstra\Cable Login\bpcable.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\Messenger\msmsgs.exe
C:\PROGRA~1\Grisoft\AVG6\AVGCC32.EXE
C:\Program Files\Internet Explorer\iexplore.exe
C:\Documents and Settings\timbo\Local Settings\Temp\Temporary Directory 1 for hijackthis.zip\HijackThis.exe

O3 - Toolbar: &Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINDOWS\System32\msdxm.ocx
O4 - HKLM\..\Run: [pccguide.exe] "C:\Program Files\Trend Micro\PC-cillin 2003\pccguide.exe"
O4 - HKLM\..\Run: [PCCClient.exe] "C:\Program Files\Trend Micro\PC-cillin 2003\PCCClient.exe"
O4 - HKLM\..\Run: [Pop3trap.exe] "C:\Program Files\Trend Micro\PC-cillin 2003\Pop3trap.exe"
O4 - HKLM\..\Run: [BigPondCable] "C:\Program Files\Telstra\Cable Login\bpcable.exe" /r
O4 - HKLM\..\Run: [AVG_CC] C:\PROGRA~1\Grisoft\AVG6\avgcc32.exe /STARTUP
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm

also found a trojan, heres hijack this log

Logfile of HijackThis v1.98.2
Scan saved at 9:13:24 PM, on 22/08/2004
Platform: Windows XP (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 (6.00.2600.0000)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\spoolsv.exe
C:\PROGRA~1\Grisoft\AVG6\avgserv.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Trend Micro\PC-cillin 2003\Tmntsrv.exe
C:\Program Files\Trend Micro\PC-cillin 2003\tmproxy.exe
C:\Program Files\Trend Micro\PC-cillin 2003\PccPfw.exe
C:\Program Files\Trend Micro\PC-cillin 2003\pccguide.exe
C:\Program Files\Trend Micro\PC-cillin 2003\PCCClient.exe
C:\Program Files\Trend Micro\PC-cillin 2003\Pop3trap.exe
C:\Program Files\Telstra\Cable Login\bpcable.exe
C:\WINDOWS\System32\ctfmon.exe
C:\Program Files\Messenger\msmsgs.exe
C:\PROGRA~1\Grisoft\AVG6\AVGCC32.EXE
C:\Program Files\MSN Messenger\msnmsgr.exe
C:\PROGRA~1\YAHOO!\MESSEN~1\ymsgr_tray.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Documents and Settings\timbo\Desktop\HijackThis.exe

O4 - HKLM\..\Run: [pccguide.exe] "C:\Program Files\Trend Micro\PC-cillin 2003\pccguide.exe"
O4 - HKLM\..\Run: [PCCClient.exe] "C:\Program Files\Trend Micro\PC-cillin 2003\PCCClient.exe"
O4 - HKLM\..\Run: [Pop3trap.exe] "C:\Program Files\Trend Micro\PC-cillin 2003\Pop3trap.exe"
O4 - HKLM\..\Run: [BigPondCable] "C:\Program Files\Telstra\Cable Login\bpcable.exe" /r
O4 - HKLM\..\Run: [AVG_CC] C:\PROGRA~1\Grisoft\AVG6\avgcc32.exe /STARTUP
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\System32\ctfmon.exe
O4 - HKCU\..\Run: [Yahoo! Pager] C:\PROGRA~1\YAHOO!\MESSEN~1\ypager.exe -quiet
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\MSN Messenger\MsnMsgr.Exe" /background