Verify your Java version here: http://www.java.com/en/download/installed.jsp
Update, if necessary.
Uninstall all previous Java versions, through Add\Remove (Programs & Features in Vista).

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Print this post out, since you won't have an access to it, at some point.

1. Open HijackThis.

2. Close all windows, except for HijackThis.

3. Put checkmarks next to the following HijackThis entries:

- O4 - Global Startup: Adobe Gamma Loader.lnk = ?
- O15 - Trusted Zone: http://*.buy-internetsecurity10.com
- O15 - Trusted Zone: http://*.buy-is2010.com
- O15 - Trusted Zone: http://*.is-software-download.com
- O15 - Trusted Zone: http://*.is10-soft-download.com
- O15 - Trusted Zone: http://*.buy-internetsecurity10.com (HKLM)
- O15 - Trusted Zone: http://*.buy-is2010.com (HKLM)
- O15 - Trusted Zone: http://*.trymedia.com (HKLM)

4. You should also checkmark following entries (these are unnecessary startups; no actual programs will be removed):

- O4 - HKLM\..\Run: [nwiz] nwiz.exe /installquiet /keeploaded /nodetect
- O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
- O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Java\jre6\bin\jusched.exe"
- O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
- O4 - HKLM\..\Run: [AppleSyncNotifier] C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleSyncNotifier.exe
- O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
- O4 - HKCU\..\Run: [MSMSGS] "C:\Program Files\Messenger\msmsgs.exe" /background
- O4 - HKCU\..\Run: [LDM] C:\Program Files\Logitech\Desktop Messenger\8876480\Program\BackWeb-8876480.exe
- O4 - HKCU\..\Run: [LogitechSoftwareUpdate] "C:\Program Files\Logitech\Video\ManifestEngine.exe" boot
- O20 - Winlogon Notify: !SASWinLogon - C:\Program Files\SUPERAntiSpyware\SASWINLO.dll

5. Click on Fix checked button.

6. Restart computer.

7. Post new HijackThis log.