You are welcome but can I ask that you do not quote every reply as I have to read the full post to make sure nothing gets missed,, thanks.
Not a good PSU for a high end build, Corsair recommend its use as below;
CX Series Modular power supply units are an excellent choice for basic system builds and desktop PC computer upgrades, offering high reliability, low noise, and the flexibility of modular cabling.
Whenever there is anything more than an entry level add on GPU involved you should always have a minimum of a Gold efficiency rated PSU from a proven brand such as Corsair, EVGA or Seasonic, what is recommended for your GPU here I reckon 750W would be enough but because you have the additional storage devices the stated 800W wouldn`t go to waste.
Without the additional storage devices you may get away with the present PSU and be ok to do some basic troubleshooting such as making sure that all modular cables are securely connected at both ends, removing and reinserting the RAM and following the steps to change the Windows Power Plan, other than that I can only see removing the RTX 2080 from the MB and using the onboard video until an appropriates PSU is available.
To your Speccy report;
Power Profile
Active power scheme: High performance
I suggest that you change the Windows Power Plan to Balanced, High Performance is a form of overclocking that is known to cause stability and overheating issues and the setting should only be used for gaming type notebooks that have a discrete GPU that needs the extra power.
Antivirus
Windows Defender
Antivirus: Enabled
Virus Signature Database: Up to date
Malwarebytes
Antivirus: Disabled
Virus Signature Database: Up to date
If Malwarebytes is trying to load on boot but failing that could cause issues, it is not working and you do not need it in any event so get rid of it.
Having more than one AV or Firewall installed on your computer is bad, it will slow down the computer, cause internet connection problems and leave you with no AV protection at all if they cancel each other out as they fight for resources.
Windows 8, 8.1 and 10 come with an improved Windows Defender, it offers the same real-time anti-virus/anti-malware protection as Microsoft Security Essentials. Windows Defender also shares the same malware signature definitions as Microsoft Security Essentials, and Forefront Endpoint Protection. Technically, Microsoft Security Essentials has not been renamed Windows Defender, or combined with it in Windows 8, 8.1 and 10.
If any AV product that you have is a paid for version you should always make sure that you have a copy of the product key kept somewhere safe just in case you ever wish to reinstall it.
Malwarebytes removal info here
Once MBAM has been correctly uninstalled, check to see if Windows Defender has auto enabled and allow it to update and carry out a full scan of your computer.