First of all, there is no such thing as DDoS protection. But, there is such thing as DDoS mitigation (mitigation is making something less severe), which is something CloudFlare offers.
You can also code your IP into your habbo.swf and use free cloudflare to hide your IP if you want to save your...
Try this. Stop MySQL, and install it as a service. Then again, make sure its stopped.
Next, open up run on your start menu and run: services.msc
Next, look for MySQL service, and then start it.
This may or may not work, but it's worth a shot.