Uninstall Bitdefender

I am so piss when last night my laptop become super slow and cannot open any single file after installing the Bitdefender Antivirus 2008. I reboot again and again even trying to start my laptop on a safe mode but still not good. I restart my laptop using the last setting that work then I uninstalled bitdefender and again reboot and now it back on track. Did anyone of you experiencing this before? I'm not sure either something wrong during installation or the software of antivirus had problem.