If you cannot enter Safe Mode, then you may then have to boot into Windows 11/10 with your Windows Installation Media or Recovery Drive and select Repair your computer to enter Troubleshoot ...

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(which most of my searching has told me is normally related to people forgetting to plug in the ATX12V1 connection)<BR><BR>Removing the 8800GTS and plugging in my 7600GS allows the system to boot ...