Pc bloque pc performance and analysis...sos!

Bonjour,

j"ai besoin d'aide, mon ordinateur portable m'a lacher. raison :
"pc performance & analysis report.."
les fichiers son vides, le desktop noir, et le menu start vide de tous favoris....

comme vu sur ce forum, j'ai fait un scan malwarebyte: cidessous le log>

je suis sur vista.
merci d'avance

Malwarebytes' Anti-Malware 1.51.1.1800
www.malwarebytes.org

Database version: 7277

Windows 6.0.6002 Service Pack 2
Internet Explorer 9.0.8112.16421

7/26/2011 7:30:57 PM
mbam-log-2011-07-26 (19-30-57).txt

Scan type: Full scan (C:\|D:\|E:\|F:\|)
Objects scanned: 467292
Time elapsed: 3 hour(s), 16 minute(s), 53 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 8
Registry Values Infected: 1
Registry Data Items Infected: 5
Folders Infected: 0
Files Infected: 5

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{59C7FC09-1C83-4648-B3E6-003D2BBC7481} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{68AF847F-6E91-45dd-9B68-D6A12C30E5D7} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{9170B96C-28D4-4626-8358-27E6CAEEF907} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{D1A71FA0-FF48-48dd-9B6D-7A13A3E42127} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{DDB1968E-EAD6-40fd-8DAE-FF14757F60C7} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{F138D901-86F0-4383-99B6-9CDD406036DA} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\RunDll32Policy\f3ScrCtr.dll (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Multimedia\WMPlayer\Schemes\f3pss (Adware.MyWebSearch) -> Quarantined and deleted successfully.

Registry Values Infected:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\NvCplDaemonTool (Trojan.Agent.WIMP) -> Value: NvCplDaemonTool -> Quarantined and deleted successfully.

Registry Data Items Infected:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\buy-security-essentials.com\http (Hijack.TrustedZone) -> Bad: (2) Good: (4) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\download-soft-package.com\http (Hijack.TrustedZone) -> Bad: (2) Good: (4) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\download-software-package.com\http (Hijack.TrustedZone) -> Bad: (2) Good: (4) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\get-key-se10.com\http (Hijack.TrustedZone) -> Bad: (2) Good: (4) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\is-software-download.com\http (Hijack.TrustedZone) -> Bad: (2) Good: (4) -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
c:\Users\Vaio\AppData\Roaming\microsoft\Windows\start menu\Programs\Startup\scandisk.lnk (Trojan.Downloader) -> Quarantined and deleted successfully.
c:\Windows\msmark2.dat (Worm.KoobFace) -> Quarantined and deleted successfully.
c:\Windows\t55ft2732f44.dat (Worm.KoobFace) -> Quarantined and deleted successfully.
c:\Windows\t55ft2792f44.dat (Worm.KoobFace) -> Quarantined and deleted successfully.
c:\Windows\t55ft2810f44.dat (Worm.KoobFace) -> Quarantined and deleted successfully.