Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: BIOS does not boot from ODD or External Drive

31 Jan 2018   #11

Windows 7 HP 64

Did the laptop came with Win 7 or Win 8?

To enter BIOS you press F2.
Boot order press F11. Pag 125
Sony eSupport - VPCEB23FM - Support

My System SpecsSystem Spec
11 Feb 2018   #12

Windows 7

I apologize for not coming back to this. I did not want to leave this thread dead for days.

Out of the outcomes of this problem, let's break it down:

1) If I insert the Win 7 ISO disc, BIOS will not boot from it.

2) If I insert an external drive with Win7 ISO files, BIOS will not boot from it.

3) My BIOS does not possess Legacy or UEFI boot features.

4) My BIOS will only boot to internal drive, most preferably with the Samsung SSD resulting to a god awful boot to desktop screen or my Toshiba SSD with the 'No Operating system Found' message.

5) I can't replace my ODD because I think that's not the case of broken hardware resulted into this situation.

6) I have to say there is something wrong with my dual CMOS perhaps. If the RTC battery stores all of the important BIOS files then I say that it might be corrupted or something. I don't get any system beeps of any kind such as an RTC failure but I might have to say one my Dual CMOS cells are on the verge of dying.

Do anyone of you think it could be this problem perhaps?

Should I replace my CMOS instead? :/
My System SpecsSystem Spec
11 Feb 2018   #13

Win 10 x64, Linux Lite, Win 7 x64, BlackArch, Kali, VMWare Workstation Player, OpenVPN

It's almost impossible to provide an effective solution if you don't follow recommendations exactly and then post the results. I see this scenario repeat quite often and as an individual trying to provide free assistance, it is extremely frustrating, to say the least.

How have you been trying to enter boot sequence to boot from Optical Drive?

Method: insert DVD into OD, if you have to turn on the computer to open the drive, insert the disk, then power down the machine. Power on computer and immediately start pressing an F key Megahertz07 is probably correct that is is F2, (mine is F9 but have HP and Compaq machines), however, trial and error always works, and you'll then know what all the other F keys do at boot-time. If you don't begin pressing an F key soon enough it will boot to the first available drive in the current boot sequence. You only need to replace your CMOS battery if setting don't remain, i.e., most notably your system time changes. (your local time zones is most likely not the same as the bios default).

Even if you have no HDD or SSD in your machine, if you press the appropriate F key it will enter the boot screen as the BIOS chip is on the motherboard, you can then peruse the menu and determine which keys to press to select the OD. It's that simple. The first time I tried I started at F1 and when through F12, some keys do nothing, some keys do the same as another.

If BIOS doesn't recognize your OD there may be a connection issue or the drive may be defective. If the connection are ok and Bios NOT showing the drive its EITHER the drive itself....OR the drives motherboard controller.
My System SpecsSystem Spec


 BIOS does not boot from ODD or External Drive

Thread Tools

Similar help and support threads
Thread Forum
BIOS Q; Cannot boot with [extra] drive on PCI/IDE Card...
(if the sub-forum is wrong place for the thread, sorry; mods/admin move accordingly) I have W7 RTM new install, which boots fine as long as an old HDD is NOT connected to a PCI IDE Controller Card. If I plug in the HDD, W7 will not load. It WILL boot with the Card plugged in, but will NOT...
Hardware & Devices
Unable to boot into BIOS when external HDD connected
Hi all I am having a weird issue, as the title says, I am unable to boot into BIOS when I have the external HDD connected via USB 3.0. when i want to start it up and boot into windows it starts to load the windows installer which you would find like on a win 7 install disk but then stops. ...
Hardware & Devices
Cant boot past bios, sees boot drive prio correctly
Hey guys, My PC was working correctly this morning and then when I came home from work and turned it on the machine doesnt load past the bios splash screen. Sometimes the one screen pops on after that says some info with the drives, ram etc but it turns black quickly with a little white line...
BSOD Help and Support
Boot Drive not listed in BIOS / Empty Boot Tab in Sys Config
Hello, For some reason my boot drive is not listed in UEFI BIOS where you choose the boot drive sequence, still the computer boots OK from that drive. I checked the System Config and the Boot tab is completely empty and I'm unable to make any changes there. When I try to run BCDEdit it says "the...
General Discussion
Boot to BIOS and boots from external disc but not from Hard drive
Hi, My Acer netbook has developed some kind of fault and I am unsure as to what I ought to do, The netbook does boot to BIOS and also will boot up from an external drive...but will not boot normally. I am thinking of replacing the hard drive but don`t know if there could be something else...
General Discussion

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 14:38.
Twitter Facebook Google+