I don't think it as a good option. I did the safe mode one and it detected a virus. Than the pc is working fine. I m just trying malware byte but i want to ask should i do install it with bitdefender. Or delete bit-defender and than install.
DONT DELETE BITDEFENDER. Bitdefender 2012/2013 is the best antivirus I have ever seen. I have tested a lot of antivirus and very impressed with it. The only thing you should take care is the system requirements for bitdefender before installing it. I have my own VIRUS collection and tested by each antivirus.
Malwarebytes is good at blocking malware, but it does not detect those viruses which is detected by other well known antivirus vendors. My suggestion is to use bitdefender/kaspersky internet security suits or their higher version.
ONE IMPORTANT NOTICE:
dont install any other antivirus/antimalware along with bitdefender (especially malwarebytes), ur pc will not be usable(most probably) after a reboot . You might need to go into safe mode. ALWAYS RUN ONLY A SINGLE ANTIVIRUS.