Missing Operating System Tags: BIOS Computers Windows 7 Last response: December 24, 2012 11:48 PM in Windows 7 Share Pilot996 December 24, 2012 11:14:06 PM I am building a computer for the first time ever. I turn on the computer, the BIOS screen flashes and then a black screen appears displaying the text "Missing operating system." I am booting my Windows 7 from a flash drive, if this helps. More about : missing operating system Brett928S2 a b $ Windows 7 December 24, 2012 11:18:18 PM Hi Then go into Bios and tell it to BOOT from USB...FIRST ! All the best Brett m 0 l Pilot996 December 24, 2012 11:20:38 PM I have a ASRock Z75 Pro3 Motherboard if that helps. I cant find the option. m 0 l Related resources The application or operating system couldn't be loaded because a required file is missing or contains errors - Forum Missing Operating System. - Forum "Missing Operating System" Error - Forum Please help! Missing operating system! - Forum missing operating system - Forum Can't find your answer ? Ask ! Get the answer Brett928S2 a b $ Windows 7 December 24, 2012 11:22:22 PM Pilot996 said:I have a ASRock Z75 Pro3 Motherboard if that helps. I cant find the option. Hi Look for BOOT OPTIONS or BOOT ORDER... they are in there.... All the best Brett m 0 l Pilot996 December 24, 2012 11:48:30 PM I found a guide, how do I know if my mobo is UEFI or BIOS? m 0 l Can't find your answer ? Ask ! Publish Related resources Solvedmissing operating system Forum Solvedtried to wipe harddrive,now get "operating system missing..." no cursor/BLACK screen Forum Solvedmissing bootmgr and missing operating system Forum SolvedMissing operating system after BIOS P8Z77-V PRO, LGA 1155,Intel i7 3770k Forum SolvedMissing Operating System Forum Get a blue screen crash at idle then a black screen saying "Missing Operating System". Forum SolvedMissing Operating System On Bootup, Or Restart Forum Solvedoperating system missing Forum Solvedhow to get windows 98 to start when operating system is missing Forum Solvedmissing operating system in laptop Forum SolvedThinkpad Edge missing Operating system? Forum SolvedMissing operating system and numbers lock key Forum SolvedMissing operating system Forum Solved"Operating system missing" and the blue screen of death Forum SolvedBootMGR missing. No Operating System. Forum More resources Read discussions in other Windows 7 categories Configuration Customization Drivers Security Laptops !