Hi, I have this same exact problem. I finally got around all the conflicts with Skype and got the other things running, but mysql won't stay up.
A bit of history.. I am working with Magento and wanted to set up a local development environment on my win 7 pc. Well, after a while of trying to manually install php, mysql, and apache, I found a knowledgebase article at magento.com pointing to XAMMP. So that's great, I have solution! Well I tried uninstalling everything, and it seemed to work, and I also ended up installing/removing XAMMP a few times since I didn't know why I was getting the port conflicts, and one of them was 3306 but I think that was only the last time... anyway do you think it could be some left over problem with my original sql install? I am not sure what to do to resolve this.