It seems to me that rainlender is stuck on a bad theme. Here's what you can do. I've had this problem before. If you are using winXP, press ctrl-alt-delete. Under processes, look for rainlender. Highlight it, and click end process. Then, if you remember the last theme you applied with rainlender, go to its directory and delete that folder. Then, you can restart rainlender from its program shortcut. It should say that the last theme is missing and it is going to apply the default theme. That should fix your problem. The custom rainlender skin was bad for your system. It could be a old version of rainlender(as it was with mine), or just a rainlender skin that doesn't work right for you. For me, it was both. I updated rainlender and the author fixed his skin for me. If this doesn't work, once the rainlender process is ended, you can uninstall it. But, I think the above will solve your problem.