windows 7 - Does a quarantine virus in the Antivirus Program still exist in system 32 or will be executable in the future?

Nowadays, the virus are so intelligent, they also can create a fake antivirus service program which same name as our antivirus name. The malicious script also create some other fake program which same name like a normal program such as Fake 360 Total Security service program, Fake AlilM malware, Fake KV player malware, Fake QQPROTECT malware. etc. How to detect and remove those fake program if antivirus can't detect them?

Recently, I had scanning all the virus, malware and suspicious software with an Antivirus program. The antivirus program send them all to the quarantine file. Do I need to delete all of these malware in the quarantine file or just quarantine them?