My computer has accumulated several instances of malware over the years, including an unfortunate download of a fraudulent anti-virus browser that caused redirects while using Google. I remedied the situation by running a scan with Malwarebytes, which detected and quarantined around 90 viruses and Trojans. After marking the threats for deletion and restarting the computer, I encountered an issue where the monitor showed a "no signal" error. Despite attempting various troubleshooting methods, the error persisted and resulted in an "Inaccessible Boot System" message upon startup. I tried using three different boot methods and a pre-boot diagnostic test, but it indicated that no hard drive was connected. Upon examining the physical components, everything appeared to be in working order. I am unable to progress past the pre-boot screen and seek assistance.