Topic: Silverlight not being recognized

Report Abuse Report Abuse
jdneedham (Over 1 year ago)
I have installed Silverlight 3 (3.0.40723.0) on my desktop and yet it doesn't recognize it. I can't install the latest version because I don't have the admin rights to do so. Is it absolutely necessary to have the latest version running?


douglas (Over 1 year ago)
Hi Dave,
  unfortunately we do require the latest version of Silverlight, 3.0.40818.0, since it contains some updates we need to run our latest release.

kstanford (Over 1 year ago)
I am having a problem with Silverlight as well. I do have admin rights and when I install Silverlight is tells me it was successful. When I attempt to run a synth I get a screen asking me to install Silverlight which it attempts to do and fails with a message that it is already installed. I have uninstalled and reinstall Silverlight 3 times to see if the install was not correct and keep having the same problem. Any help would be greatly appreciated! Thanks! Kate
douglas (Over 1 year ago)
Hi Kate,
  can you please let us know  the following details:

Operating System: Vista, Win7, OSX etc
Browser: IE8, FF3 etc

Also can you see other Silverlight sites okay, if you go to the following site do you see a Silverlight application running:

Also can you let us know what version of Silverlight you have installed (in IE8 you can go to Tools->"Manage Add-Ons" there should be a list of plugins that are running with a version number, you should see "Microsoft Silverlight"

kstanford (Over 1 year ago)
Hi Mark
I went to that site and was asked to download Silverlight. I removed the one on my computer and reinstalled from that site. Going back to the site it asked me again to download the software. I am running IE8, Win XP and Silverlight 3.0.40818.0. Silverlight saids it installed correctly each time I install it. Also from the add on list it said it was enabled. Thanks for your help.
Nathanael (Over 1 year ago)
Kate, it is a beta version, but you might try the Silverlight 4 Beta. I've seen it solve this sort of error on multiple machines lately.

You can download it here:

Just look for where it says 'Windows Runtime'. Let me know if this alleviates your problems.
workerbee007 (Over 1 year ago)
Having the same problem running Win 7 64 bit from Dell with Silverlight installed already.  Silverlight version is 3.0.4536.1000 26.6 mg install.
I cannot view any files and it points me to download the silverlight but when I try it cannot install the file on a 64 bit since it allready has it installed.  I downloaded the file and it shows ver 3.0.40818.0 with product version 5.5.0031.0 so I am guessing its for 32 bit version anyway and cannot install on the 64 bit client. and the file size is only 4.823 KB in size.
What version should I be installing to make it work  on 64 bit win7 client?
Nathanael (Over 1 year ago)
Hi, WorkerBee007, 

>> To the best of my knowledge (I'm only your fellow Photosynther - not anyone from Microsoft) Silverlight only works within the 32 bit version of Internet Explorer. 

>> On Windows 7 64 bit, you have both the 32 bit and the 64 bit versions of Internet Explorer, but you'll need to use the 32 bit IE to run most plugins, Silverlight included. 

>> Since Silverlight is only offered in 32 bit, it should automatically install to C:\Program Files (x86)\... (where all 32 bit apps are installed on any 64 bit version of Windows) rather than C:\Program Files\...

>> Your currently installed version of Silverlight ( 3.0.4536.1000 ) definitely needs to be updated to the current version of Silverlight ( 3.0.40818.0 ). If necessary, uninstall the current version, download the installer for the most recent version from (installer should only be 4.7 Megabytes), and flush your browser's cache.
Nathanael (Over 1 year ago)
Ah, I was not careful enough looking at the version numbers. My mistake. In any case, regardless of your version number from Dell, I recommend uninstalling and getting the most recent version from the site I linked to above.

Also you can try the Silverlight 4 Beta that I linked to above as it has solved any quarrel that individual apps were having with my machines about current versions of Silverlight. (I've seen it solve the problem on both a Windows xp machine and an iMac running Mac OS 10.Leopard.)
seshkanuri (Over 1 year ago)
Currently Silverlight is not supported by64-bit Internet Explorer (IE). However, we can use 32-bit IE instead. Please use the following steps to set 32-bit IE as the default browser.

1. Click "Start" and then type "Default Programs" in the search box, click on it.

2. Choose “Associate a file type or protocol with a program”.

3. Scroll down to click .mht type.

4. Click Change program and choose Internet Explorer (32-bit) to open .mht files.

Note: If you do not see the choice Internet Explorer (32-bit), please click Browse…, Locate the fileC:\Program Files (x86)\Internet Explorer\iexplore.exe, then click Open to choose the program.

5. Check “Always use the selected program to open this kind of file”.

6. Click OK.


If steps 1 fails, go to next step.


Step 2:


Browse to the below location C:\Program Files (x86)\Internet Exp