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If a Lenovo M92p skips a Windows USB or DVD installer—or freezes at the Lenovo splash screen—start by checking the installation media and boot-device menu. If the PC still rejects every removable-media option and hangs at startup, corrupted BIOS firmware is one possible cause. In a documented 2015 case, boot-block recovery followed by a BIOS update restored the ability to start the Windows installer. That report is a useful troubleshooting example, not proof that BIOS corruption explains every M92p boot problem.
What the documented M92p case found
An AnandTech forum member reported on September 10, 2015, that a Windows 10 x64 USB installer restarted the computer into Windows instead of launching setup. A DVD installer behaved similarly. The machine later stopped at the Lenovo splash screen.
The owner tried removing a Radeon card, testing memory sticks individually, disconnecting USB devices other than a keyboard connected to USB 2.0, and substituting a known-good power supply. Clearing CMOS restored access to UEFI, but did not fix the removable-media boot failure. On September 14, the owner reported that boot-block recovery restored an uncorrupted BIOS; after updating the BIOS from a flash disk, the Windows installation disc booted successfully. Read the solved AnandTech thread.
Troubleshoot the installer before attempting BIOS recovery
1. Check the media and simplify the connection
- Verify that the Windows installer was created as bootable media, and if possible test it on another computer.
- Try a known-good USB flash drive connected directly to a rear USB port. Remove nonessential peripherals while troubleshooting.
- If using a DVD, check that the disc is readable and that the M92p’s optical drive works.
These checks help distinguish an installer or connection problem from a firmware problem; they do not establish that any particular USB drive, port, or disc is at fault. Lenovo notes that the boot menu displays only drives the system recognizes as bootable. Lenovo guidance on selecting a boot device.
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2. Open the boot menu or BIOS and select the installer
Use Lenovo’s model-appropriate method to enter BIOS setup or the boot menu, then check boot order and select the USB or optical installation entry if it appears. Lenovo provides M92p-specific pages for entering BIOS, changing boot order, and selecting a boot device. Follow the instructions applicable to your machine; do not assume a key sequence that is not confirmed for it.
If the USB drive is missing from the menu, the system may not recognize it as bootable. Recheck media creation, try another port or known-good drive, and consider firmware or device-detection trouble if multiple bootable options are also rejected.
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If the M92p hangs at the Lenovo splash screen
A splash-screen freeze combined with failure to start USB and DVD media is a reason to investigate startup or firmware problems, but it does not identify a cause on its own. In the documented case, clearing CMOS restored UEFI access; it was an intermediate step, not the repair.
Clear CMOS only by following the procedure in the manual for the exact machine type. Afterward, retry BIOS access and the boot-device menu. Avoid treating a CMOS reset as a BIOS repair: the reported system continued to reject removable media until boot-block recovery and a BIOS update.
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When BIOS recovery may be appropriate
Consider firmware recovery only when simpler media and connection checks have not resolved the problem and the symptoms point to a system-level failure. The 2015 report attributes that machine’s failure to corrupted BIOS firmware and says boot-block recovery, followed by a BIOS update from a flash disk, restored installer booting.
That is one user’s reported outcome, not a universal M92p procedure. BIOS packages and recovery instructions can depend on machine type and firmware version. Identify the exact M92p machine type, obtain its matching Lenovo BIOS package, and follow Lenovo’s instructions and release notes. The report does not establish one recovery keystroke sequence or one BIOS version for every M92p. Lenovo’s M92p BIOS release notes and download page is a starting point for checking the applicable package and instructions.
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Choosing replacement installation media
If you need to recreate the installer, choose media based on whether it can be made bootable for the Windows installer you intend to use, whether its capacity is sufficient, and whether it works with the M92p’s older USB ports. Reliability and the ability to reformat it are also useful considerations. For DVD installation, the disc’s condition and the optical drive’s condition both matter. The solved report gives no benchmark or success-rate comparison for USB versus DVD.
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