Merci de ton aide et voici le nouveau hijackthis que tu m'a demandé :
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"hpsysdrv"="c:\\windows\\system\\hpsysdrv.exe"
"iTunesHelper"="\"C:\\Program Files\\iTunes\\iTunesHelper.exe\""
"Recguard"="C:\\WINDOWS\\SMINST\\RECGUARD.EXE"
"AlcxMonitor"="ALCXMNTR.EXE"
"LSBWatcher"="c:\\hp\\drivers\\hplsbwatcher\\lsburnwatcher.exe"
"BDMCon"="\"C:\\Program Files\\Softwin\\BitDefender10\\bdmcon.exe\" /reg"
"BDAgent"="\"C:\\Program Files\\Softwin\\BitDefender10\\bdagent.exe\""
"NeroFilterCheck"="C:\\WINDOWS\\system32\\NeroCheck.exe"
"LVCOMSX"="C:\\WINDOWS\\system32\\LVCOMSX.EXE"
"LogitechVideoRepair"="C:\\Program Files\\Logitech\\Video\\ISStart.exe"
"LogitechVideoTray"="C:\\Program Files\\Logitech\\Video\\LogiTray.exe"
"PS2"="C:\\WINDOWS\\system32\\ps2.exe"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OptionalComponents]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OptionalComponents\IMAIL]
"Installed"="1"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OptionalComponents\MAPI]
"Installed"="1"
"NoChange"="1"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OptionalComponents\MSFS]
"Installed"="1"