The Disk Defragmenter is not installed on your computer

Error: The Disk Defragmenter is not installed on your computer. To install itdouble click the Add or Remove Program icon in the Control Panel, click Install/Uninstall tab and then follow instructions on your screen

SYMPTOM : When you open the Properties dialog box for a local hard disk and click the Tools tab, one of the following symptoms may be seen: The Defragment Now button is unavailable. When you click Defragment Now, you receive the following error message: The Disk Defragmenter is not installed on your computer. To install it, double-click the Add or Remove Programs icon in Control Panel, click the Install/Uninstall tab, and then follow the instructions on your screen.

RESOLUTION :
Click Start, type regedit.exe and press ENTER
Navigate to the following location: HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ explorer \ MyComputer \ DefragPath

In the right-pane, double-click (default) and set its data as follows:
C:\Windows\System32\dfrgui.exe
Close Regedit.exe and restart the pc

How To Disable Low Disk Space Checks In Windows Vista

When your hard drive is nearly out of free space, Windows Vista will warn you with a little pop-up box. This can be handy the first time but that's usually where the usefulness stops.

Follow these steps to disable Low disk space message

1. Click on Start, type the following command in the search box, and then hit the Enter key. regedit
This command will load the Registry Editor program.

Note: Changes to the registry are made in these steps. Take great care in making only the changes described below.

2. Locate the HKEY_CURRENT_USER folder under Computer and click on the (+) sign next the folder name to expand the folder.

3. Continue to expand folders until you reach the HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion registry key.

4. Select the Policies key under CurrentVersion.

5. From the Registry Editor menu, choose Edit, followed by New, followed finally by Key.

6. After the key is created beneath Policies, it will initially be named New Key #1.
Change the name of the key to Explorer by typing it exactly as shown and then hitting the Enter key.

7. With the new key, Explorer, still selected, choose Edit, followed by New, followed finally by DWORD (32-bit) Value.

8. After the DWORD is created beneath Explorer, it will initially be named New Value #1. Change the name of the DWORD to NoLowDiskSpaceChecks by typing it exactly as shown and then hitting the Enter key.

9. Right-click on the new NoLowDiskSpaceChecks DWORD you just created and choose Modify.

10. In the Value data: field, replace the zero with the number 1.
11. Click OK and close Registry Editor.

Windows Vista will no longer warn you about low disk space on any of your hard drives.

0x8024402F while updating Windows Defender in Vista or Windows Update in XP

0x8024402F

If you have a Wireless Router:-

In the security tab, make sure you aren't blocking AcitveX. Stuck at "Checking for latest updates for your computer"Possible reasons for the error code:-

1. Internet Explorer temporary files corrupted.

2. Background Intelligent and Event Log service not started

3. SoftwareDistribution folder has become corrupted

4. You may need to re-registered some dlls files

5. You may need to add Windows Update to the Trusted Sites Zone:

6. Spyware.

7. Third party programs running in background.

8. ActiveX controls corrupted.

Suggestion 1:-
Clearing Temporary Internet files, cookies and history in Internet Explorer

Tools>Internet Options>General

You’ll see Delete Cookies, Delete files, Delete History

NB: "Delete all offline content", will delete all files needed to browse the websites offline.

Reboot and try Windows Update again.

Suggestion 2:-

Check that the Background Intelligent Transfer Service to is set to Automatic and verify the Status is Started.

1. Click Start, Choose Run, and in the Run box, type services.msc, Click OK

Locate the Background Intelligent Transfer Service service, and right-click to select it.

Select Properties, and in the Startup Type list, select Automatic.

Verify the service Status is Started. Click OK.

2. Check that the Set Event Log service is set to Automatic and verify that the Status is Started

Click Start, Choose Run, and in the Run box, type services.msc, Click OK.

Locate the Event Log service, and right-click to select it.

Select Properties., and in the Startup type list, select Automatic.

Verify the Service status is Started. Click OK.

3. Register qmgr.dll and qmgrprxy.dll

Click Start, Choose Run and in the Run box, type regsvr32 qmgr.dll, Click OK.

Click Start, Choose Run and in the Run box, type regsvr32 qmgrprxy.dll, Click OK.

Suggestion 3:-

It is possible that the contents of the SoftwareDistribution folder have become corrupted, so try renaming the SoftwareDistribution folder

Click Start, Choose Run. In the Run box, type services.msc. Click OK.

Right-click the Automatic Updates service.

Click Stop.

Stopping the service will take a moment.

Rename the "SoftwareDistribution" folder:

1. Click Start, click Run, type: %systemroot%Click OK.

2. Right-click the SoftwareDistribution folder, and then click Rename.

3. Type SoftwareDistribution.old, and then press ENTER to rename this folder.

Click Start. Choose Run.

In the Run box, type services.msc. Click OK.

Right-click the Automatic Updates service.

Click Start.Starting the service will take a moment.

Please note that your update history is contained in the "datastore" folder and when you rename the Software Distribution folder, the history is lost but it's not important.

You can if need be, copy the contents back from the renamed softwareDistribution.old folder. Losing the history of Windows Updates is not important.

Suggestion 4:-
Certain files may have become unregistered, and you will need to register them again:-

Click Start, Choose Run and in the Run box, type regsvr32 wuaueng1.dll

Click OK.

Do the same for the other files:-
wucltui.dll

wuaueng.dll

wuapi.dll

jscript.dll

MSXML.DLL

MSXML2.DLL

MSXML3.DLL

Suggestion 5:-

Add Windows Update to the Trusted Sites Zone:
Please note that Security settings in Internet Explorer must be set to Medium or lower for ActiveX files to correctly pass to your computer.

Only the Web sites listed in Internet Explorer's Trusted Sites Zone will be affected by the lowering of Security settings.

Your current security settings for all other Web sites will remain as they are currently configured.
Open Internet Explorer, click Tools, and then click Internet Options, Click Security.

Click Trusted Sites Zone. Click Sites.

Clear the Require server verification (https:) for all sites in this zone check box.

Use the Add button next to the Add this Web site to the zone box to add the following sites:
http://*.update.microsoft.com

https://*.update.microsoft.com

http://download.windowsupdate.com

Suggestion 6:-

The below links assist you in checking your system for parasites:-

http://aumha.org/a/noads.htm
http://inetexplorer.mvps.org/tshoot.html

Please note that some malware may kill the internet connection when it is removed, the program on the link below will enable you to regain the internet connection.

http://www.cexx.org/lspfix.htm

Spyware Programs links:-
http://www.microsoft.com/athome/security/spyware/software/default.mspx (Windows Defender)
www.lavasoftusa.com Ad-Aware
www.security.kolla.de Spybot

Suggestion 7:-

Make sure you haven’t got anything blocking Windows Update like Nortons, Zonealarm etc
Also make sure you don’t have a Web Accelerator working in the background such as NetZerio, HiSpeed, Speedband etc.

Suggestion 8:

If you need to reinstall the ActiveX controls (because they may have become corrupt):-

Follow this article -

The Windows Update Web site and the Microsoft Update Web site do not scan for updates when you repair a failed installation of Windows XP Service Pack 2 or of Windows XP Service Pack 1

http://support.microsoft.com/kb/916259