Thread: Error code 1500? (Another installation in progress)

I've been attempting to install the new windows anti-spyware program that is on the Microsoft web site and also some other programs through the internet. I've also been trying to install the Kodak software from a disk and through their website and I obtain an error message "1500" (another
installation is in progress, complete that installation first). Well I'm not installing anything. Does this have anything to do with the registry? And /or Microsoft Office? I also initiate a program on the Microsoft website that is assume to clear any installation problems like the one I've been having but as you can almost certainly guess I can't even install that program either.
Thanks.

You have to Open Task Manager and on the Processes tab sort by Image Name. Also click at the show processes from all users. Look for the file msiexec.exe. You should search for the two instances of this file running. This may be the cause of the problem. Select one of the files and click End Process. Repeat the same procedure for the other file too. Then try your download. One instance of msiexec.exe will open. The download will be successful. You will possibly find that two instances of the file will start each time you turn on your computer and that you will have to repeat these steps for any more downloads. Not just right since it is not a cure but a satisfactory work around.