Why can't i download itunes? Windows error

Question

Everytime I try to download Itunes it says it cannot succesfully download due to windows error or itunes helper is not installed correctly. I've already tried EVERYTHING apple has told me to do and it still has not helped. PLEASE help!!

Answer 1

This is directly from the Windows support forums for Error 126
Method 1
Check if Windows Update Service is selected as start.
To do this, follow these steps:
    1.Click on Start, Run and type the following command in the open box and click OK.
      In services.msc find the Automatic Updates service and double-click on it.
1. Click on the Log On Tab and make sure the "Local System Account" is selected as the logon account  and the box for "allow service to interact with desktop" is UNCHECKED.
2. Under the Hardware Profile section in the Log On Tab, make sure the service is enabled.
  3. On the General Tab, the Startup Type should be Automatic, if not, drop the box down and select  Automatic.
4. Under "Service Status" on the General tab, the service should be Started, click the Start button enable it.
Repeat the steps above for the service "Background Intelligent Transfer Service (BITS)".
Method 2
You may also re-register Windows Update DLLs.
To do this, follow these steps:
    1.Click on Start, Run, and type CMD and click ok
    2.In the black command window type the following command and press Enter
      REGSVR32 WUAPI.DLL
     Wait until you receive the "DllRegisterServer in WUAPI.DLL succeeded" message and click OK.
    * Repeat the same step for each of the following commands:
      REGSVR32 WUAUENG.DLL
      REGSVR32 WUAUENG1.DLL
      REGSVR32 ATL.DLL
      REGSVR32 WUCLTUI.DLL
      REGSVR32 WUPS.DLL
      REGSVR32 WUPS2.DLL
      REGSVR32 WUWEB.DLL
Method 3
Remove the corrupted Windows Update Files. To do this, follow these steps:
    1. At the command prompt, type the following command and press Enter
      net stop WuAuServ
    2.  At the command prompt,
      type cd %windir% and press Enter
    3. In the opened folder, type the following command and press Enter to rename the  Software Distribution Folder
      ren SoftwareDistribution SD_OLD
    4.Restart the Windows Update Service by typing the following at the command prompt
      net start WuAuServ
Type Exit and Press Enter to close the command prompt.
1.       Reboot the computer and check if you have similar issue.
2.       Hope the information helps. Please post back and let us know.
3.       Regards,
Debleena S
Microsoft Answers Support Engineer
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