System File Checker<\/a> (SFC) is a tool built into modern Windows versions. It allows you to fix corrupt system files in Windows.<\/p>\n\n\n\nYou can run the SFC command to analyze and repair corrupted system files here.<\/p>\n\n\n\n
Press the Windows + x shortcut key combination to launch the command menu, select the command prompt (Admin)<\/strong>, and run the following command:<\/p>\n\n\n\n\n- sfc\/scannow\/offbootdir=c: \/offwindir=c:windows <\/strong><\/li>\n<\/ul>\n\n\n\n
If the problem persists after executing those two commands, you may have to apply a DISM scan. Try executing this command:<\/p>\n\n\n\n
\n- DISM \/Online \/Cleanup-Image \/restorehealth <\/strong><\/li>\n<\/ul>\n\n\n\n
These commands will prompt the system file checker utility to analyze the integrity of the Windows system files and repair them if required. Once the process is complete, reboot your PC.<\/p>\n\n\n\n
<\/span>Method 6: Fix Damaged MBR<\/strong><\/span><\/h3>\n\n\n\nMBR is the information in the first sector of a hard disk or removable drive, and it contains a program that reads the boot sector record of the partition, which includes the OS to be loaded. If this system malfunctions, your windows cannot boot up and receive error messages like \u201cNo Boot Device.\u201d\u00a0<\/p>\n\n\n\n
Fixing MBR can help to resolve this issue. Access the Command Prompt and execute the following command sequence:<\/p>\n\n\n\n
\n- bootrec \/fixmbr<\/strong><\/li>\n\n\n\n
- bootrec \/fixboot<\/strong><\/li>\n\n\n\n
- bootrec \/scans<\/strong><\/li>\n\n\n\n
- bootrec \/rebuildbcd<\/strong><\/li>\n<\/ul>\n\n\n\n
After executing these commands, restart your PC.<\/p>\n\n\n\n
<\/span>Method 7: Rebuild MBR Directly Without Windows CD<\/strong><\/span><\/h3>\n\n\n\nIn fixing the \u201cNo Bootable Device\u201d problem, the Windows CD for installation is required. However, you can also resolve this issue without a Windows CD. All you have to do is follow the steps below to rebuild MBR directly without any CD.\u00a0<\/p>\n\n\n\n
\n- Download the freeware<\/strong> and then install it on your Windows computer.\u00a0<\/li>\n\n\n\n
- Run the AQMEI<\/strong> Partition Assistant Standard and click the \u201cmake bootable media<\/strong>\u201d wizard option. <\/li>\n\n\n\n
- After that, insert the bootable USB into the Acer computer with no bootable device error. <\/li>\n\n\n\n
- This will display the option to \u201cRebuild MBR<\/strong>\u201d; select it.<\/li>\n\n\n\n
- Return to the main interface, and click \u201cApply<\/strong>\u201d and \u201cProceed<\/strong>\u201d to begin Rebuilding the MBR.<\/li>\n<\/ul>\n\n\n\n