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This solution didn't work for me.

This did...

In C:\WINDOWS\Installer moved the most recent installers to a different directory.

Installed WWT

Moved the installers back 

 Unfortunately, clearing the Windows temp directory or moving the Windows installer folder contents did not help for me.  However, I did get it to install successfully by moving the downloaded installer into a directory only containing the installer.

 I've tried deleting the contents of both temp directories but still have the problem with WWT trying to setup RemoteCalanders. 

 What did work was to move the setupwwt.exe to an empty folder and then running it from there.

I found that by moving the install folder to a different directory it installed correctly.

The cleartype install popping up was really beginning to tick me off. I tried emptying the Temp folder but that wasn't helpful at all.

Thanks for the heads up Guys, it was really helpful.

Cheers,

Bill

Jim, this worked for me as well. Thanks for posting it, Perry

This does seem to be the best fix for this issue:

Save WWT Setup to a different directory

• Create a folder called "wwt" on your root drive Example: c:\wwt"
• Go to http://www.worldwidetelescope.org/ download WWT. When prompted, Save the file to the folder you created.
• Navigate to the folder you created and run WWT Setup.
• Delete the setup file and folder once installation is complete.

If you start WWSetup.exe then do not exit the different setup program do the following:

1. Start Command Prompt (cmd.exe)

2. dir %temp%\WWTSetup.msi /s

3. Find the relevant directory and executee the MSI or setup.exe from that directory

 Example:

C:\DOCUME~1\Malc\LOCALS~1\Temp>dir %temp%\WWTSetup.msi /s
 Volume in drive C has no label.
 Volume Serial Number is 5814-391F

 Directory of C:\DOCUME~1\Malc\LOCALS~1\Temp\WZSE0.TMP

10/05/2008  02:14 PM        21,182,976 WWTSetup.msi
               1 File(s)     21,182,976 bytes

     Total Files Listed:
               1 File(s)     21,182,976 bytes
               0 Dir(s)   2,561,495,040 bytes free

chentiangemalc:

If you start WWSetup.exe then do not exit the different setup program do the following:

1. Start Command Prompt (cmd.exe)

2. dir %temp%\WWTSetup.msi /s

3. Find the relevant directory and executee the MSI or setup.exe from that directory

 Example:

C:\DOCUME~1\Malc\LOCALS~1\Temp>dir %temp%\WWTSetup.msi /s
 Volume in drive C has no label.
 Volume Serial Number is 5814-391F

 Directory of C:\DOCUME~1\Malc\LOCALS~1\Temp\WZSE0.TMP

10/05/2008  02:14 PM        21,182,976 WWTSetup.msi
               1 File(s)     21,182,976 bytes

     Total Files Listed:
               1 File(s)     21,182,976 bytes
               0 Dir(s)   2,561,495,040 bytes free

 

 Hi chentiangemalc,

Thank you for the suggestion but, we now have a hotfix for this issue: Hotfix Available

Empty the Temp directory didn´t work for me but moving the installer to an empty folder works fine. Thanks Jim

Cheers.