The log is clean.

You have some unnecessary startups, so open HJT.
Put a checkmark next to the following HijackThis entries (some entries will be checkmarked to disable unnecessary startups; in those cases (marked with *), no actual program will be removed):
- *O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
- *O4 - HKLM\..\Run: [Dell AIO Printer A920] "C:\Program Files\Dell AIO Printer A920\dlbkbmgr.exe"
- *O4 - HKLM\..\Run: [HostManager] C:\Program Files\Common Files\AOL\1136607537\ee\AOLSoftware.exe
- *O4 - HKLM\..\Run: [dscactivate] "C:\Program Files\Dell Support Center\gs_agent\custom\dsca.exe"
- *O4 - HKCU\..\Run: [MoneyAgent] "C:\Program Files\Microsoft Money\System\mnyexpr.exe"
- *O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
- *O4 - HKCU\..\Run: [updateMgr] "C:\Program Files\Adobe\Acrobat 7.0\Reader\AdobeUpdateManager.exe" AcRdB7_0_9 -reboot 1
- *O4 - Global Startup: NkbMonitor.exe.lnk = C:\Program Files\Nikon\PictureProject\NkbMonitor.exe
- *O20 - Winlogon Notify: !SASWinLogon - C:\Program Files\SUPERAntiSpyware\SASWINLO.dll
Click Fix checked button.

Restart computer.

1. Download, and install CCleaner: http://www.ccleaner.com/download/builds. Get "Slim" version.
Read CCleaner instruction here: http://www.jahewi.nl/ccleaner/ccleaner.html.
Run CCleaner.

2. Turn off System Restore:

- Windows XP:
1. Click Start.
2. Right-click the My Computer icon, and then click Properties.
3. Click the System Restore tab.
4. Check "Turn off System Restore".
5. Click Apply.
6. When turning off System Restore, the existing restore points will be deleted. Click Yes to do this.
7. Click OK.
- Windows Vista:
1. Click Start.
2. Right-click the Computer icon, and then click Properties.
3. Click on System Protection under the Tasks column on the left side
4. Click on Continue on the "User Account Control" window that pops up
5. Under the System Protection tab, find Available Disks
6. Uncheck the box for any drive you wish to disable system restore on (in most cases, drive "C:")
7. When turning off System Restore, the existing restore points will be deleted. Click "Turn System Restore Off" on the popup window to do this.
8. Click OK

3. Restart computer.

4. Turn System Restore on.

5. Let me know, how your computer is doing.