problème virus spyware

bonjour.
j' ai un souci avast me détécte des virus, et quand j' ai ouver internet explorer il ma détécter plusieurs virus et il m'a afficher sa.
Attention! Scanner has performed fast system scan. That means that not all entities were checked and possible threats could remain. It is recommended to download the program and implement full system scan. Download AntiSpywareMaster now
Progress 100%
Scanning dpnhpast.dll
Folder Directories Threat type
Program Files
Trojan-Dropper.Win32.VB.om
Email.Worm.win32.Warezov.qy
Windows
CoolWebSearch(CWS).win32

Backdoor.SdBot.gen
Worm.Win32.Skipi.a
N-case.win32
...\Program Files\Internet Explorer\iexplorer.exe
...\Program Files\Outlook Express\msimn.exe

...\Windows\System32\restore\restr.dll
...\Windows\System32\spool\drivers\w32x86\mdui.dll
...\Windows\System32\AdapterTroubleshooter.exe
...\Windows\security\database\edbres00002.jrs
Virus
Spyware

Virus
Spyware
Virus
Virus
svp. pouvez vous m' aider