what should I do my hdd slow boot
Please tell me the model of your Dell computer and operating system.
Please post back and let me know if you need more help.
Welcome to the Community
First step is we can run a PSA diagnostics test on your computer to check the functionality of the hardware components, please follow the link below which explains the step to run PSA.
And if PSA test doesn’t find any error message, please try booting in safe mode to check if the computer is booting slow in safe mode.
Also please let us know which system model you have?
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You can reach us at http://en.community.dell.com/