How to delete all partitions in windows 11?

For your goal of maximum safety (concerned about hidden malware), I'd recommend HP's Own Secure Erase to delete partitions on Windows 11. It's truly best and performs a cryptographic wipe that destroys everything—including any potential malware that might hide in partition tables or reserved areas. The time investment is worth the peace of mind.

Step1: Restart your ProBook and press F10 repeatedly to enter BIOS Setup

Step 2: Navigate to the Security menu, then scroll down to Utilities

Step 3: Select Hard Drive Utilities

Step 4: Choose Secure Erase

Select your SSD when prompted

Follow the on-screen instructions

Step 5: IMPORTANT: The laptop must be plugged into AC power, and the process can take several hours

Step 6: Once complete, your SSD will be completely wiped—all partitions gone, all data unrecoverable

The advantage: About deleting partitions on Windows 11.This method performs a hardware-level wipe. It's what HP recommends for sanitizing drives before disposal . It guarantees that any malware in hidden sectors or firmware areas is destroyed.