Need Some Good Advice!!

Hello all-

i just have a few questions about anti-virus programs.I am currently using panda antivirus7 platinum version,b/ when ever i try to load any other virus scanner it seems to not be compatible with them.When ever i reboot i get a blue screen telling me to remove or fix any recently downloaded programs and that the window will be closed until it is fixed.then i am always directed to the safe mode options screen.The pc will go back to normal once i take the new antivirus program off or if i take of the panda antivirus and use the other program.Which program is compatible with Panda Anti-virus7 platinum is my question,I know it is good to run 2 @ the same time and i dont know if panda is well rounded were it does not need another anti-virus interface running next to it.So if someone can take the time and dicipher thru my gibberish and can tell me if Panda anti-virus is a stand alone program or if there is a anti-virus program that can run along with it ,please let me know!!thank you for your time!!