My pc starts and shows that my hard drive is occupied.

Check for Available Storage Space.

Open "File Explorer" and check the properties of your hard drive to see how much space is being used and how much is available.

Disk Cleanup.

Run the built-in Disk Cleanup tool to remove unnecessary files.

Search for "Disk Cleanup" in the Start menu, select the drive you want to clean, and follow the prompts to delete temporary files, system cache, and other non-essential items.

Uninstall Unnecessary Programs.

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Delete Temporary Files.

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Check for Large Files.

Use a tool like WinDirStat or TreeSize to analyse the disk usage and identify large files or folders that may be taking up significant space.

Empty Recycle Bin.

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Manage System Restore Points:

Reduce the amount of space allocated to system restore points.

Delete Duplicate Files:

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Move Files to External Storage:

If possible, transfer larger files like videos, photos, or backups to an external hard drive or cloud storage.

Check for Hidden Files:

Sometimes hidden files or system files can take up space. Enable viewing of hidden files through the "Folder Options" in File Explorer.

Hope this helps