does the Graphix card support dual monitors?

Yes Dual Monitors are supported

What type of processor does this desktop PC have?

The desktop PC has an Intel Core i5-8500T processor.

Yes, this desktop PC comes with Windows 11 Pro 64-bit pre-installed.

It will be an M.2 NVME SSD so no caddy needed.

Holiday Shipping Details & Extended Holiday Returns

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HP Business Desktop EliteDesk 800 G4-MINI Intel Core i5-8500T 16GB DDR4 256GB SSD Intel UHD Graphics 630 Windows 11 Pro 64-bit