What do I need to do to get PHOTOSYNTH to install??!!

Do you see the yellow "run this activex object?" question bar at the top of the screen? If so you have to allow it, if not you may have activex blocked completely. What anti-virus do you use?

use Norton Anivirus. Don't see any activex approval request . when I log on to photosynth and click on recently synthed, it immediately requests me to download the drivers that I've already done!
Thanks anyway.

Try and add photosynth to your safe sites; check your privacy settings in IE to allow ActiveX controls or at least prompt.

I don't see the yellow 'run this active object' bar. I am pretty sure I have activex enabled (I clicked enable on all the options in IExplorer). I am using Norton's anti virus.

Do I need to turn the Firewall off while I install the software?

Go to tools, "pop up blocker" "turn off pop up blocker"!!!

When I try to add Photosynth to safe sites list, it saves it, but it tells me it needs to be https (Photosynth is http).

Pop Up blocker is OFF

For me it works in IE, Firefox, and Flock but there is one more step to getting it to run in IE (namely, clicking on the yellow information bar at the top of the screen and saying "Run Add-On".

It seems that many people are not even seeing this little bar in IE, and can't figure out how to let the ActiveX control have permission to run on photosynth.net.

Obviously you wish that it could just work in Internet Explorer, but you might want to to try Firefox or Flock to see if they'll treat you right while you figure out what's up with IE.

Best of luck!

Well, since this topic has bounced back up to the top of the list, people must still be having difficulties with it. Here's a couple of things that I've come across that may solve the problem for you.

It may just be an issue of Internet Explorer not having the ActiveX plugin approved. If you downloaded and installed Photosynth before September 8th, you should try downloading the updated plugin which ScottF reports is preapproved.

Also, you may have missed it, but Bitplane reported about a month back that if your user string (that is, what your browser is introducing itself as to websites that you visit) has gotten too long from different things that you've installed, you may get the 'your OS/browser is not currently supported' type error or be continually prompted to reinstall. He also provided a link to check what your user string is as well as an example of what will work and what will be too long if you read the next two posts after the one containing the user string check.

Hopefully that can either fix your problem or help you narrow down what your problem is. If it turns out to be the second error (long user string), be sure to visit Bitplane's bug report and click the "I have this problem too!" button so that Live Labs can know to investigate it.