Originally Posted by jammyb
I am running windows 7
Win7 by default doesn't allow some wamp packages to run due to a system permission issue which didn't exist in XP.
What you have to do is this:
Right click on each programs .exe file (apache.exe, mysql.exe and php.exe), click properties then the compatibility tab. Now at the bottom, click "Change settings for all users". At the bottom of the next window you must check "Run this program as an administrator". Ok your way out of that and then re-try to run it again (also be sure to be rid of IIS).
FYI there is also the uniformserver - another wamp setup which I personally found to be better than xamp because it takes less disk space and still has most of the functionality.