Problem with avast

I had avast installed and suddenly I was no more able to open .exe files
here below my Kasper scan
is anyone able to tell me how can I clean my pc considering that it is still not possible to open any .exe file ( only explorer can be opened)?
Thanks in advance for your help

KASPERSKY ONLINE SCANNER REPORT
Saturday, March 22, 2008 7:39:52 PM
Operating System: Microsoft Windows XP Professional, Service Pack 2 (Build 2600)
Kaspersky Online Scanner version: 5.0.98.0
Kaspersky Anti-Virus database last update: 22/03/2008
Kaspersky Anti-Virus database records: 654607


Scan Settings
Scan using the following antivirus database extended
Scan Archives true
Scan Mail Bases true

Scan Target My Computer
A:\
C:\
D:\
E:\
F:\

Scan Statistics
Total number of scanned objects 42220
Number of viruses found 7
Number of infected objects 9
Number of suspicious objects 2
Duration of the scan process 00:47:52

Infected Object Name Virus Name Last Action
C:\Documents and Settings\Fabio\Cookies\index.dat Object is locked skipped

C:\Documents and Settings\Fabio\Dati applicazioni\Microsoft\MSNLiveFav\LiveFavorites.xml Object is locked skipped

C:\Documents and Settings\Fabio\Documenti\Downloads\WGA Patcher Permanent Kit by Lollone\WGA Patcher Permanent Kit\keyfinder.exe/data.rar/officekey.exe Infected: not-a-virus:PSWTool.Win32.RAS.a skipped

C:\Documents and Settings\Fabio\Documenti\Downloads\WGA Patcher Permanent Kit by Lollone\WGA Patcher Permanent Kit\keyfinder.exe/data.rar Infected: not-a-virus:PSWTool.Win32.RAS.a skipped

C:\Documents and Settings\Fabio\Documenti\Downloads\WGA Patcher Permanent Kit by Lollone\WGA Patcher Permanent Kit\keyfinder.exe RarSFX: infected - 2 skipped

C:\Documents and Settings\Fabio\Impostazioni locali\Cronologia\History.IE5\index.dat Object is locked skipped

C:\Documents and Settings\Fabio\Impostazioni locali\Cronologia\History.IE5\MSHist012008032220080323\index.dat Object is locked skipped

C:\Documents and Settings\Fabio\Impostazioni locali\Dati applicazioni\Microsoft\Windows\UsrClass.dat Object is locked skipped

C:\Documents and Settings\Fabio\Impostazioni locali\Dati applicazioni\Microsoft\Windows\UsrClass.dat.LOG Object is locked skipped

C:\Documents and Settings\Fabio\Impostazioni locali\Temporary Internet Files\Content.IE5\index.dat Object is locked skipped

C:\Documents and Settings\Fabio\NTUSER.DAT Object is locked skipped

C:\Documents and Settings\Fabio\ntuser.dat.LOG Object is locked skipped

C:\Documents and Settings\LocalService\Cookies\index.dat Object is locked skipped

C:\Documents and Settings\LocalService\Impostazioni locali\Cronologia\History.IE5\index.dat Object is locked skipped

C:\Documents and Settings\LocalService\Impostazioni locali\Dati applicazioni\Microsoft\Windows\UsrClass.dat Object is locked skipped

C:\Documents and Settings\LocalService\Impostazioni locali\Dati applicazioni\Microsoft\Windows\UsrClass.dat.LOG Object is locked skipped

C:\Documents and Settings\LocalService\Impostazioni locali\Temporary Internet Files\Content.IE5\index.dat Object is locked skipped

C:\Documents and Settings\LocalService\NTUSER.DAT Object is locked skipped

C:\Documents and Settings\LocalService\ntuser.dat.LOG Object is locked skipped

C:\Documents and Settings\NetworkService\Impostazioni locali\Dati applicazioni\Microsoft\Windows\UsrClass.dat Object is locked skipped

C:\Documents and Settings\NetworkService\Impostazioni locali\Dati applicazioni\Microsoft\Windows\UsrClass.dat.LOG Object is locked skipped

C:\Documents and Settings\NetworkService\NTUSER.DAT Object is locked skipped

C:\Documents and Settings\NetworkService\ntuser.dat.LOG Object is locked skipped

C:\Programmi\Alwil Software\Avast4\DATA\aswResp.dat Object is locked skipped

C:\Programmi\Alwil Software\Avast4\DATA\Avast4.db Object is locked skipped

C:\Programmi\Alwil Software\Avast4\DATA\log\AshWebSv.ws Object is locked skipped

C:\Programmi\Alwil Software\Avast4\DATA\log\aswMaiSv.log Object is locked skipped

C:\Programmi\Alwil Software\Avast4\DATA\log\nshield.log Object is locked skipped

C:\Programmi\Alwil Software\Avast4\DATA\report\Resident protection.txt Object is locked skipped

C:\Programmi\DAEMON Tools SearchBar\Search.exe Infected: not-a-virus:AdTool.Win32.WhenU.c skipped

C:\System Volume Information\MountPointManagerRemoteDatabase Object is locked skipped

C:\WINDOWS\Debug\PASSWD.LOG Object is locked skipped

C:\WINDOWS\SoftwareDistribution\ReportingEvents.log Object is locked skipped

C:\WINDOWS\system32\bobabob.dll Infected: Trojan.Win32.Delf.zj skipped

C:\WINDOWS\system32\CatRoot2\edb.log Object is locked skipped

C:\WINDOWS\system32\CatRoot2\tmp.edb Object is locked skipped

C:\WINDOWS\system32\config\Antivirus.Evt Object is locked skipped

C:\WINDOWS\system32\config\AppEvent.Evt Object is locked skipped

C:\WINDOWS\system32\config\default Object is locked skipped

C:\WINDOWS\system32\config\default.LOG Object is locked skipped

C:\WINDOWS\system32\config\SAM Object is locked skipped

C:\WINDOWS\system32\config\SAM.LOG Object is locked skipped

C:\WINDOWS\system32\config\SecEvent.Evt Object is locked skipped

C:\WINDOWS\system32\config\SECURITY Object is locked skipped

C:\WINDOWS\system32\config\SECURITY.LOG Object is locked skipped

C:\WINDOWS\system32\config\software Object is locked skipped

C:\WINDOWS\system32\config\software.LOG Object is locked skipped

C:\WINDOWS\system32\config\SysEvent.Evt Object is locked skipped

C:\WINDOWS\system32\config\system Object is locked skipped

C:\WINDOWS\system32\config\system.LOG Object is locked skipped

C:\WINDOWS\system32\drivers\sptd.sys Object is locked skipped

C:\WINDOWS\system32\h323log.txt Object is locked skipped

C:\WINDOWS\system32\ipv6mops.dll Suspicious: Packed.Win32.Morphine.a skipped

C:\WINDOWS\system32\jcteyaaa.exe Infected: Backdoor.Win32.Small.na skipped

C:\WINDOWS\system32\jhrbaaaa.exe Infected: Trojan-Spy.Win32.BZub.in skipped

C:\WINDOWS\system32\jqivyftx.exe Infected: Trojan.Win32.Delf.zj skipped

C:\WINDOWS\system32\LogFiles\WUDF\WUDFTrace.etl Object is locked skipped

C:\WINDOWS\system32\mannglpv.exe Object is locked skipped

C:\WINDOWS\system32\sqlihkzb.exe Object is locked skipped

C:\WINDOWS\system32\svcxoqzt.exe Object is locked skipped

C:\WINDOWS\system32\wbem\Repository\FS\INDEX.BTR Object is locked skipped

C:\WINDOWS\system32\wbem\Repository\FS\INDEX.MAP Object is locked skipped

C:\WINDOWS\system32\wbem\Repository\FS\MAPPING.VER Object is locked skipped

C:\WINDOWS\system32\wbem\Repository\FS\MAPPING1.MAP Object is locked skipped

C:\WINDOWS\system32\wbem\Repository\FS\MAPPING2.MAP Object is locked skipped

C:\WINDOWS\system32\wbem\Repository\FS\OBJECTS.DATA Object is locked skipped

C:\WINDOWS\system32\wbem\Repository\FS\OBJECTS.MAP Object is locked skipped

C:\WINDOWS\Tasks\ayoxpxw.job Object is locked skipped

C:\WINDOWS\Tasks\bftmjbx.job Object is locked skipped

C:\WINDOWS\Tasks\kal.job Object is locked skipped

C:\WINDOWS\Tasks\nnfhag.job Object is locked skipped

C:\WINDOWS\Tasks\pmcp.job Object is locked skipped

C:\WINDOWS\Tasks\ywbme.job Object is locked skipped

C:\WINDOWS\Temp\Perflib_Perfdata_510.dat Object is locked skipped

C:\WINDOWS\Temp\_avast4_\Webshlock.txt Object is locked skipped

C:\WINDOWS\update.html Suspicious: Packed.Win32.Morphine.a skipped

C:\WINDOWS\WindowsUpdate.log Object is locked skipped

C:\WINDOWS\winlogon32.dll Infected: Trojan-Clicker.Win32.Small.kj skipped

Scan process completed.

You are infected so lets start repairs.

Make sure any antivirus or protective software is disabled.
Here is a tutorial for most programs.
http://www.bleepingcomputer.com/forums/topic114351.html

Then Download ComboFix.exe from HERE to your desktop, but I would like you to rename the file as you download it (do not download it directly without renaming it). Just save it to your desktop as MyCombo.exe. Then click the MyCombo.exe file to run the repair.

Allow the scan to run. When completed a text window will appear - please copy/paste the contents back here. This log can also be found at C:\ComboFix.txt.

When starting ComboFix will cause your computer's internal speakers to produce two beeps, and during the start process display two warnings. These are intended to discourage people who are not getting help in the forum from just experimenting with tools they do not understand. Just to inform you so you will understand that the procedures are expected, and okay.


A caution - do not touch your mouse/keyboard until the scan has completed. The scan will temporarily disable your desktop, and if interrupted may leave your desktop disabled. If this occurs, please reboot to restore the desktop, however given the infection there ComboFix will likely cause a reboot in order to complete it's repairs.

(ComboFix will also disable any screensaver settings made, so know that at some point when we complete repairs you will need to reset your screensaver)

Post back the C:\ComboFix.txt log