I am using Windows 11 and the latest upgrade to Quicken Classic Deluxe. Downloads to Vanguard work well. Download transactions stopped on 9/10/2025
Please do TOOLS, Account List and tell use what it says in the "Transaction Download", "Last Download" and "Financial Institution" columns adjacent to your Fidelity accounts.
Because I download from Fidelity into Q 6 days a week, including this morning, without issue.