My device is stuck in bootloop and my USB debugging is disabled. When I type adb devices in CMD, it says adb is not recognized as an internal or external command operable program or batch file. Please help
35786
When it comes to , I often read recommendations like "Use adb logcat to find some more details". Looking for a good way to backup all my apps including their data,  refers to adb backup and adb restore. In several places one can find ways to remotely do on an Android device with the use of , such as transferring files using adb push or adb pull, accessing the  via adb shell, and more. So ADB seems to be a good thing to have for an Android user.  But how to get this "ADB thingy" on my computer? Not being a developer, installing the entire  seems a bit overkill. Is there a more minimalistic approach available?
113244
If the which command is not available, is there another 'standard' method to find out where a command's executable can be found?  If there is no other 'standard' method available, the actual system I face currently is a bare Android emulator with an ash , if that means anything.
31844
I installed a nightly build, but now some important features of my phone don't work: it boot-loops, or can't make calls, or can't use mobile data, or something like that. What can I do about it?     N.B. This is a "canonical question" for all similar questions, because questions about specific bugs in one particular nightly build of a ROM are way too specific to have any long-term value. See  to learn why this question was created, and why your particular question about nightly builds might have been closed as a duplicate of this one.
17888
I have Windows 7 installed in my internal HDD and wanted to try out Ubuntu so I have an USB to put Ubuntu LiveUSB on and installed Ubuntu on a external HDD and everything worked out fine.  Now the problem. If I remove the external HDD and try to boot Windows normally it shows the grub rescue screen. The only way to boot into Windows is by having the external HDD attached.  Is there any way I can make it so I won't have to have the external HDD attached to be able to boot my Windows 7?
26256
I have a problem where sometimes, when I start my computer it won't boot past the windows logo - the spinning dots don't even show up. Usually, a power down and power up again solves it - but sometimes it happens more than once in a row. And sometimes it doesn't happen at all.   I seem to remember something like this being a problem with Windows 8/8.1 too, and back then it was because of issues with USB 3 devices. But I have tried all combinations of disabled/enabled USB xHCI and eHCI devices that I can think of, and updates all of the USB drivers.   I can't find ANY log info or any errors in event log of what is going wrong when it doesn't boot. Is there any way to log boot info that early in the boot process?
25678
I'd like to build a version of Ubuntu that has absolutely no ability to recognize any USB device inserted. Is this possible?  There's the issue that mouses and keyboards nowadays are connected via usb, so I wonder if it's possible to recognize these but not everything else.  In the end it's a security measure, so different solutions to achieve this goal are also welcome.
93133
When the device is set to use MTP, neither Windows, nor ADB will detect the device when connect via USB cable. I have tried multiple cables, in multiple USB ports. I have not tried other computers yet, as this is the only one that actually has the driver installed.  Disclaimer: I am running an Unofficial CyanogenMod 12 build of Android 5.0.2  Device : LG G3 (LG-D855) Android 5.0.2  Google USB Driver: Installed USB debugging: Enabled PC: Windows 8.1 Pro Update 1 No one, except me, has reported this as an issue in the .   I have been unable to get my PC to detect the device via USB since I first installed CM12, which was around 11/10/2014.      If i change to PTP, Windows will detect the device, as will ADB. But Windows will only let me access the internal storage, and Camera folders.
29713
When the bootloader (GRUB) is broken, I cannot access neither Ubuntu nor Windows.  I heard that an easy solution to fix this is to use the Boot-Repair tool from an Ubuntu liveCD (or liveUSB).  What are the steps to do this?
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I was having a time getting my bootable USB 3, 32GB W10 install USB to be recognized. It recognized one time but I had to restart for something and it never came up again. I eventually removed all other boot up options to make it easier and faster to try again (no F12 needed).  Finally I gave up and tried another drive (16GB this time FWIW) and then it worked.  HOWEVER, it's stuck on a reboot loop now. I can choose to install, then to select the right disk, then it says it's loading file and then next thing I know it's saying do you want to install or upgrade.
36057
Possible Duplicate:             I know there are a lot of tools to create a bootable usb for ubuntu with windows.  But I'm sure, that there was a possibility in the ubuntu installation directory. I used it some time ago, but I can't find it anymore :(  I think it was a .exe, or a .bat, any case a cmd window has opened, some things were executing and the usb was bootable. And it was in the ubuntu directory!  Is there still the possibility to do that? Does that file exist? I unfortunately can't remember.
16981
After an installation of Ubuntu 12.04, erasing an old partition with Ubuntu 10.10, I can't get grub to load. I can't access my Windows 7 partition either  I get the message:  &gt; error: no such device: 58ABF29C...   grub rescue&gt;   I suppose my master boot record got erased/corrupted. How can I check and fix this?
97937
Computer was humming away happily.  It had downloaded a kernel update eariler in the week and been asking for a reboot since.  This morning I relented.  When the computer powered back up it made a loud repeated clicking noise which I tracked down to my hard drive by opening the cover.  Since then I can't boot the computer - it keeps failing out to netboot (which goes nowhere).  Based on a quick google I think the disk is history.  Does anyone know of a way to recover the disk?  I realise I'm probably SOL but it's worth asking.   Edit  Thanks for the answers.  All very interesting and informative.  Nothing on the drive is worth the cost of a professional recovery service and my backups cover the important bits anyway.  I was just hopeful that I might be able to avoid the nuissance of a rebuild on a new disk.
54508
I have a Windows 10 computer. This morning it restarted into a blue screen with error code Inaccessible boot device.  There are no recent hardware changes. Also I think it was not after a Windows update installation. At least I chose Restart to restart, and not Update and restart as usual before an update installation.  According to other posts related to this problem I tried the following:   Restart into save mode: no success, the same error displays Restart into recovery console: The system partition usually mounted as C: is available as D:   chkdsk d: /x completes without finding any error. I conclude, that the problem is not related to a hard disk failure. bootrec /fixboot completes with success.  bootrec /scanos completes with a message Number of Windows installations identified : 0. Why doesn't it find the Windows installation, even though it is available under D:\ ? sfc /verifyonly has found integrity violations, but sfc /scannow finished with the message The Windows resource protection was not able to complete the operation.  System restore to a previous restore point: After a (long) while, the task completed, but without solving the problem. Booting from the Windows Installation disk:   I tried the option Repair Windows: It was not possible to roll back to a previous restore point Update Windows keeping programs and files seems to work only when booting first into the current installation to do an upgrade. It cannot be done while booting from the installation disk (as it was the case in previous versions of Windows).     Is there anything left I could do before reinstalling Windows 10 ?  Edit: Now there is the second computer with the same problem within 2 days. This smells like an epidemy (caused by a bad Windows update ?)  This time I tried:   Restart into save mode: no success, the same error displays System restore to a previous restore point : No success, it offers to try from another restore point.   I stopped here. I just don't want do make a mistake that forces me to reinstall it.
54123
After Ubuntu boots, the tty1  &nbsp;Ctrl+Alt+F1 shows this:     Thegatorade-PC login: mountall: disconnected from Plymouth    mountall: Event failed   This happened after partitioning with gparted and happens every time I use Ubuntu.
52648
I recently tried to install a custom ROM in my samsung j6+ but halfway through it my PC turned off. Then the problem starts i decided to reboot my phone but it shows this error &quot;No command&quot; &quot; #Reboot recovery cause is [[check_bootmode]RebootRecoveryWithKey]# Block-based OTA Supported API: 3 # MANUAL MODE v1.0.0# E:Failed to mount / cache: Invalid argument  The error message keeps appearing for just a fraction of a second then disappear and appear again I tried to go to recovery mode but no luck i cant get to it I drained the battery to turn off the device then go download mode but after get to it, it also keep restarting help me please. thank you
18504
My computer no longer boots Windows or the installed operating system. Instead, I may get this error:  PXE-E61: Media test failure, check cable -or- Check cable connection!  PXE-M0F: Exiting PXE ROM.   and/or one of the following messages or similar:  Operating System not found  No boot device available- No bootable devices--strike F1 to retry boot, F2 for setup utility  No bootable device -- insert boot disk and press any key  No Boot Device Found. Press any key to reboot the machine  Default Boot Device Missing or Boot Failed  Reboot and Select proper Boot device or Insert Boot Media in selected Boot device   What does this mean and what can I do?     This question comes up often and the answers are usually the same. This post is meant to provide a definitive, canonical answer for this problem. Feel free to edit the answer to add additional details.
97834
I successfully followed instructions in   to make a bootable usb drive for ubuntu12.04 using the command 'gksudo usb-creator-gtk' in a terminal window - there were no error messages and the final pop message said I can now use the USB drive to successfully boot a system into the latest Ubuntu 12.04  However, on a brand new samsung laptop (NP-300E5Z-A0PIN - a i5 core machine), I get the following message: SYSLINUX 3.63 Debian-2008-07-15 EBIOS Copyright (c)1994-2008 H Peter Anvin Unknown keyword in configuration file Boot:  It hangs there...  Am I missing out any steps... how do I proceed with the installation... Many thanks in advance