Hello.
After installing Windows 7 64bit and BitDefender(BD) Free license I installed Office 2013 and discovered that I can't start ANY program from the MS suite, The error code was 0xc0000005 : "The application cannot start..."
After banging my head against the walls for 24 hours and trying all advice I could find and also reinstalling my kit and a second one(MS Office 2010) several times I finally considered deactivating BD and BINGO, that did it.
The behavior is still very strange to me: if I deactivate BD, start one Office program and I reactivate BD I can use the MS app normally; there is no trace of BD blocking the MS app as is the case when malware is found and blocked.
Using exclusions won't work both at file or entire Office folder level so I simply off the protection, open the program and then I activate protection. back..