If you forgot the Windows password on a Dell laptop, you may still be able to reset the PC from Windows Recovery Environment. Before resetting, understand that factory reset can remove apps and personal files depending on the option you choose.

If you cannot sign in and must remove everything, recover files first by connecting the drive to another computer or using recovery media.
Step 1. Launch Deep Data Recovery. Select the file types you need and click Fast Scan to begin.

Step 2. Choose the Dell laptop system drive or user partition that stores Desktop, Documents, Pictures, and other personal files.

Step 3. Preview the found files and select the folders you want to recover.

Step 4. Save recovered files to another healthy disk. Use Windows reset only after the files you need are safe.
A Dell laptop can be reset without signing in, but the reset choice matters. Recover or back up important files before using any option that removes everything.