Thank you for answering! What do you mean with "time period"? Do you mean whether I installed other programs after running 3.1 which may now interfere with 3.2? I installed many programs but none which I think of of possibly interfering with Uniform Server 3.2. I deinstalled Skype but Skype didn't run in the background anyway. And i closed all other programs, even my firewall and antivirus program. And if there miight be indeed a program occupying port 80 - why does 3.1 function but not 3.2 or 3.2a? Is there any special installation procedure with 3.2? I thought it's as simple as 3.1: No installation at all = unzipping and that's it. I didn't mix any files of 3.1 or 3.2 of course and I don't run 3.1 and 3.2 at the same time. And I don't need MySQL - but it worked nevertheless with version 3.1. The W:// drive exists with 3.1. only after starting the start.bat file of the 3.1 version. As described in my first post: With 3.2 and 3.2a the W:// only exists one second after running the start.bat. Which other information can I provide to help solving this puzzle??