Three of the four dumps were the same 0x000000EA: THREAD_STUCK_IN_DEVICE_DRIVER
A device driver problem has caused the system to pause indefinitely (hang). Typically, this is caused by a display driver waiting for the video hardware to enter an idle state. This might indicate a hardware problem with the video adapter, or a faulty video driver.
All three cited the Nvidia display driver nv4_disp.dll as the issue. if the card is bad no amount of driver updates will fix this. The same goes if the PCI slot is bad.
The other error is 0x00000024: NTFS_FILE_SYSTEM
A problem occurred within NTFS.SYS, the driver file that allows the system to read and write to NTFS file system drives. There may be a physical problem with the disk, or an Interrupt Request Packet (IRP) may be corrupted. Other common causes include heavy hard drive fragmentation, heavy file I/O, problems with some types of drive-mirroring software, or some antivirus software.
It noted that the driver sptd.sys was not able to load. This a driver for DAEMON Tools Virtual Drive Manager. Often configured to be the very first driver to load when system starts; may cause instability. We have seen this driver and this software cause a lot of system issues over the years.