Added the following cameras support :

Fuji FinePix F600EXR

Nikon Coolpix P7100

Olympus E-P3, E-PL3 et E-PM1

Panasonic DMC-G3, DMC-GF3 et DMC-FZ150

Pentax Q

Ricoh GXR MOUNT A12

Sony Alpha NEX-C3, NEX-5N, SLT-A35, SLT-A65 et SLT-A77

and of course bug fixes and improvements : http://www.adobe.com/special/photoshop/Lightroom_35_ReadMe.pdf

Can be downloaded here, on the right side of the page (Lightroom 3.5 update - September 29, 2011)  :

http://www.adobe.com/downloads/

The last few times I got a notice about a Lightroom update and downloaded it, the update detected my Pantip copy and froze it. I had to delete and reload.

Has anyone had any trouble accepting this up date to their Pantip copy?

I turned off Norton firewall and antivirus.

I downloaded from Adobe, ran install, got same error msg.

i downloaded from Vuze (Torrent), ran install, got same error msg; Norton still turned off.

I attempted both 3 times yesterday and 1 once this morning. That make 4 time from each source. So I have gotten this msg 8 times now.

I do not know what to try next.

The solution of your problem seems to be in the last 3 posts of the following thread :

http://forums.adobe.com/thread/658796

That is what I thought yesterday before I ran it 3 times and LR 3.5 failed to load 3 times. Then I posted here.

The posting said:

The problem was solved by using the WINDOWS INSTALLER CLEAN UP UTILITY
http://majorgeeks.com/Windows_Installer_CleanUp_Utility_d4459.html
Simply select the Adobe Lightroom from the list and delete it.

Running it did not give me a list of anything. It just whipped throughand said click finish. A search could not find it anywhere on my computer. I just ran it 3 more times; can't find it even though it says INSTALLED.

I assume I got the right program. But how could I go wrong (see screen shot and download where the red arrow is)

Now if I am supposed to delete all other lightrooms, I have not done that. I have 2.6 and 3.2 both installed. I could remove them by normal means, but I thought that was not necessary.

I have also searched for any partial load of LR 3.5 to see if that might be the problem. Can not find any.

I REALLY DO NOT WANT TO delete 3.2 in case 3.5 doesn't load and then I have to go through reinstalling 3.2. Since 3.5 is a brand new total self contained program, I would not think removing 3.2 would be required. And no one else has said they had to do that.

I just tried to load it on an external HD that does not have and has never had any Adobe product installed. Same error msg:

LIGHTROOM.EXE not marked for installation

There is something else going on; I do not see the logic of that meaning delete older version. If that were the case, I would expect some kind of msg saying ALREADY INSTALLED or some kind of conflict msg.

Problem is probably due to residues in the windows registry. Revo Uninstaller cleans the registery but you have to select manually the entries he finds.

Of course backup your catalog files before.

http://www.revouninstaller.com/revo_uninstaller_free_download.html

So no else has installed 3.5 without deleting 3.2? That is the question.

I actually have 4 versions of lightoom installed. If I could install 3 updates after V2.0 without removing older versions, why can't I install 3.5?

Specially since 3.5 seems to be a stand alone program.