Windsor Castle first appeared in Lloyd's Register (LR) in 1783 with G. Young, master, G. Tarbut, owner, and trade London–Jamaica.

Slave voyage #1 (1797–1798): Captain Thomas Jones acquired a letter of marque on 13 March 1797.

[5] Slave voyage #2 (1798–1799): Captain Jones sailed from Liverpool on 15 August 1798, bound for West Africa.

[7] Slave voyage #3 (1800–1801): Captain Jones sailed from Liverpool on 7 May 1800, bound for West Africa.

[8] Slave voyage #4 (1801–1802): Captain Gilbert Curry acquired a letter of marque on 8 July 1801.

[6] Windsor Castle acquired captives at Calabar and delivered them to Trinidad, where she arrived on 10 February 1802.

[6] It is not clear where Windsor Castle acquired captives, but she delivered them to Antigua and St Thomas.

[10] Lloyd's List reported on 15 November 1803 that Windsor Castle, which had been sailing from St Thomas to Liverpool, had foundered off Bermuda.