Question Problem with Samsung laptop 💻

[smarty°]

I acquired a Samsung Series 7 Chronos NP700Z5 from my aunt, delivered with Samsung's pre-installed software and bloatware. Choosing to optimize its performance, I conducted a comprehensive formatting and installed Windows 11 on the laptop, equipped with 8GB RAM, a 750GB hard drive, Radeon 6750M graphics, and an i7 2nd gen processor. Despite these modifications, the system failed to meet performance expectations, prompting a decision to revert to the original configuration. Challenges arose with the Samsung Recovery Solution (SRS) during this process. After unintentionally formatting its partition, I utilized Minitool Partition Master to recover the SRS partition, transferring its contents to a pendrive. Regrettably, these efforts proved ineffective, leading to unsuccessful attempts at SRS installation. Subsequent installation of Windows 7 within the SRS framework resulted in a "BOOTMGR is missing" error, concurrently impacting the BIOS functionality. Efforts to recover the BIOS inadvertently resulted in CMOS memory erasure, leading to BIOS corruption. Consequently, booting from the pendrive became unfeasible, consistently displaying a "BOOTMGR IS MISSING" error.

Seeking resolution, I consulted a professional technician who successfully restored the BIOS to its original state and installed Windows 10. Upon returning home, I endeavored to install Samsung Recovery Solution 5, achieving initial success. However, subsequent installation of Windows 7 Ultimate resulted in a persistent "BOOTMGR IS MISSING" error after restart. Multiple attempts at reinstalling Windows, along with startup repair and command-based solutions, proved futile. Undeterred, I pursued a fresh Windows 11 installation, formatting the drive. Disappointingly, the issue persisted, despite the confirmed functionality of both the BIOS and the boot manager. Urgently seeking assistance in resolving this matter