Answer:
Install in Safe Mode
Step-by-step explanation:
If a system is corrupted with malware, installing an antivirus or anti-malware might not be possible. The malware can hide in a system and it can prevent the anti malware software from installing or scanning on the system.
Running your system in safe mode and install is the best option. Safe mode blocks third party programs and hardware drivers. A malware should not start when a system is in safe mode, therefore you can install the anti-malware and scan to remove all the malware from your system.