Operating Systems





Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. For large systems, the operating system makes sure that different programs and users running at the same time do not interfere with each other. The operating system is also responsible for security, ensuring that unauthorized users do not access the system. Operating systems provide a software platform on top of which other programs, called application programs, can run.

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Running Windows 7 Professional 32-bit, my desktop has exhibited a variety of bad behaviors for the past several weeks.  These include applications freezing, black screen, unintended rebooting, and BSOD.  Once, when I tried to run Windows startup repair, the utility could not identify any installed Windows operating system.  I'm suspecting an impending hardware failure, but don't know how to isolate the problem.  I ran the WDC Diagnostic utility on the system HDD, and it passed the Quick Test.

Problem signature:
  Problem Event Name:      BlueScreen
  OS Version:      6.1.7601.
  Locale ID:      1033

Additional information about the problem:
  BCCode:      1000008e
  BCP1:      C0000005
  BCP2:      845A8885
  BCP3:      CAC53920
  BCP4:      00000000
  OS Version:      6_1_7601
  Service Pack:      1_0
  Product:      256_1

Files that help describe the problem:
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I have a CentOS 7.7-1908 clean install on a sever.  I was having trouble with YUM updating packages and I attempted to clear out the broken YUM records and start fresh.  I made it worse, and now the server isn't working at all.  I keep getting a message:

[root@localhost ~]# yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
There are no enabled repos.
 Run "yum repolist all" to see the repos you have.
 To enable Red Hat Subscription Management repositories:
     subscription-manager repos --enable <repo>
 To enable custom repositories:
     yum-config-manager --enable <repo>

Only there are no repositories in the list when I try to run the suggest commands.  Is there any way to get this back without wiping the server and starting over?  Tried some research but nothing seems to work.
Dell Inspiron 1500 (3000 series), OS Windows 10.  Ipad (3)

I followed the instructions but seem to have made a mistake. I clicked on File Sharing in Itunes and when given the list of APPS I selected the Word App which must be wrong because they are not Word Files. What App should I select  so as to transfer these JPG files successfully.  I dont see one clearly on the list.
Windows 10 Professional OS.
Computer will boot to initial screen showing background and "Time" in bottom left corner.  This prompts the user to press "Enter" - which usually provides the screen to enter login credentials.  The only thing that appears is a black window and NOTHING happens.  Eventually, the screen returns to the initial screen showing background and time.
I can get the computer to boot into Safe Mode.
I've run sfc /scannow.  This returns a prompt stating it has found corrupted files but cannot repair them.
If I attempt to run DISM commands, the commands run for several minutes.  However, I'm then prompted that these commands cannot be run in Safe Mode.
I've removed the hard drive from the computer and have attached it to another pc running Windows 7 professional.  This PC has assigned the external drive with the drive letter M:.
1) Can DISM commands be run on this external drive?
2) If there has to be a "source" from which corrupted files can be obtained and copied to drive M:, how do I provide that source.
Mac OS 10.13.3 is loaded on a Mac in a network we manage. The Mac is accessing a file using adobe illustrator opening and saving take about 30 seconds each. The windows shares that are slow have 15k files in one dir and 32k files in another. The files are 1Mb each. The network is running  at  100mbps, the processor is an core i5 the machine has 16GB ram 4GB free.  It appears that the Mac is hunting for the directory share before it saves and needs a time to find its route. The Mac saves the same file to its local drive it 10 seconds. This user is getting to cause us headaches with management.  Any ideas would be really really appreciated.
I had to replace my MacBook Pro HDD with new SSD. So, I installed OS on the new SSD with help of my other MacBook Air and now MacBook Pro wont even recognize the SSD.

It gives a folder symbol with a question mark on boot.

it does not even give the apple logo when Mac starts.

What should I do now ?
Client laptop will not boot with secure boot and existing OS install.  HDD has bad sectors and was cloned to a new HDD, which will not boot and startup repair has not been able to fix.  A clean install will boot and work properly.  Client would prefer repair of existing OS over clean OS install.  BIOS cannot disable secure boot.  Haven't found a reason behind this yet.  I will be updating BIOS next (using different HDD), if a simple solution is not found first.
Hi All,

We are planning to upgrade our domain controllers from 2008. We currently have two sites and the plan is to have a domain controller at each site for failover / disaster purposes. Unfortunately at the second site we are only running VMware 5.5. This will be getting upgraded soon, but not in time for the Domain upgrade. As far as I'm aware 5.5 will only support guest operating systems up to 2012. Can I / is it advisable to upgrade the first DC straight to 2016 and then introduce the 2nd DC at the second site as 2012. Or to upgrade the Domain / DC to 2012 at the second site and then introduce the 2016 DC at the primary site. Will the two live happily together until the VCenter upgrade?

I am upgrading several of our districts admin computers and am installing PCIe Internal NVME M.2 Drives directly to the motherboards.  In the past I created an image and then duplicated the drives to install into other systems so that I didn't have to manually install and configure each and every system.  I just had to re-enter the Microsoft License Key for the OS and Office suite.  Does anyone know of a way to duplicate these drives?  I used a 14 port Kangaroo unit to duplicate SATA drives for my older system.......just wondering if there is a piece of hardware out there that can do the same thing to the PCIe M.2 drives.  I tried using an M.2 to SATA adapter but my duplicator errored out each time stating it couldn't find a Source drive.
Planning to upgrade RHEL from 7.5 to 7.7 on several servers.  Listed below are the main OS services & programs being used.  I would like to know if there are any known upgrade issues for these as well as any general issues to look out for during the upgrade.  Also could you verify that the RHEL 7.5 glibc and kernel versions would be.  I need to know this to verify that our database will run properly.
glibc & kernel
glibc – 2.17-292
kernel – 3.10.0-1062.e17.x86_64
Services & Programs
sssd – Active Directory Integration
Mike M
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Let's say following Yocto project image or embedded linux distribution was created by using remote virtual linux box from windows computer:

Image Name:  fsl-image-validation-imx
Target:  Builds an i.MX image with a GUI without any Qt content.

Please refer to section 5.2 in attached i.MX_Yocto_Project_User's_Guide.pdf

The created filename that needs to be loaded in Secure Digital(SD) card is:  fsl-image-validation-imx-imx8qxpmek-20190904151816.rootfs.sdcard

This file has been copied from linux virtual box to windows computer.

How do I load this file into SanDisk Ultra 8GB class 10 SDHC card using my windows computer?

After successful load, this SD card will be inserted into NXP i.MX 8QuadXPlus Multisensory Enablement Kit(MEK) evaluation board to boot embedded linux kernel.

What do I need to know about SD card in order to successfully load image into it from my windows computer.  Do I need to format SD card first?  I'm familiar
with formatting hard disk but never formatted SD card?  Do I need to create partitions?  In hard disk paritions are created to load different OS in each partition.  what
about SD card?

Hard disk internal structure consists of tracks and sectors.  Do I need to know SD card structure for successfully loading image into it from windows computer?
are there any specific event logs on windows (windows 7) that indicate the exact time a machine was powered on and off. I know from analysis and testing of security.evtx its pretty close if you pick the first and last event of the day to the time a machine has been on/off but I did wonder if there was an exact event in one of the windows and/or applications and services logs which would specifically relate to power on/off for a laptop device.
Hi, I have a very old server HP Proliant ML330 G3 with an Adaptec SCSI Ultra3 and two disks.
This is not a RAID1 system: there is OS (Windows 2003 SBS) in disk1 and data folders on disk2.
disk1 is dead.
There are no backups (file system level or systemstate).
Since this server was also a domain controller, I need to reinstall from scratch
If I install from scratch Windows Server 2003 and re-create  a domain with exactly same name of previous one, same users (possilby with same password) could be works fine with workstation ?

Can I use such controller to create a true RAID 1 volume, instead of two separate disks?
Thank you
I am trying to do a quick audit of our security landscape (such as, not limited to, which versions of SQL / OS are running, patching levels, misconfigurations. attack surface etc) and thought I would ask what other people are using.  So I am currently only looking at free tools (Using Powershell / WMI etc) that are easy to use and can quickly give us an overview of the security health of our domain (Windows / Linux / Mac) - we will look at paid products separately down the line.

I welcome suggestions of tools you have used top criteria would be:-

1. Can quickly audit a whole environment preferably without needing agents preinstalled
2. Free (or very cheap)
3. Provide up to date information


I urgently require an Android OS Security Model expert(s) for lucrative short term contract within mergers and acquisitions deal.
I have to install a new SSD drive with a new Win10 OS on 12 laptops.  Is there a way to create a bootable USB drive that has the Win10 with all the software preloaded on the initial install such as Office software, Adobe, etc...

Is there a free way to setup this USB the way I want it so that I can just install the "image" as I put them together?
Sysprep on UEFI after installation of all applications.

After testing applications to be working, I have created an image with sysprep.
After the image is created and deployed to the 1st Test machine, I received the error:

"The application or operating system couldn't be loaded because a required file is missing or contains errors.

File: \windows\system32\winload.efi  "

After researching several articles, I came across one that appeared to fix this issue..
https://appuals.com/steps-to-fix-winload-efi-error-0xc0000001/   (Method 3 seemed to correct this issue)

Once this was done, it booted past this issue and went into the error
"Windows could not finish configuring the system. To attempt to resume configuration, restart the computer."

From what I have read, I maybe should have put the os in Audit mode before installing the applications?
But, it took a little time in getting all this built, so I am wondering if I need to put it in Audit mode post installation of software then sysprep?

Or, if anyone can shed any light on these issues if they have seen this?
we have a very old domain controller (bare metal) with Windows 2003 server, and we want to add a new ADD (with a more recent OS of course) and remove the old one.
Which Windows OS are eligible to do this? Can I add directly a Windows 2012 server domain controller?
At this moment I don't remember domain level (I mean: Windows 2000 or 2003).
Thank you
I'm using Excel 2010 and all of a sudden View Side by Side doesn't work. My computer here is Windows Enterprise 7, 64-bit OS. I doubt that IT is going to be able to figure it out so I'm hoping there's a simple fix that one of you know.

Thanks in advance,

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my printer is a brother hl-l2340dw.  i am using ubuntu as my OS.  is there something i should do to get this printer to work?  i am hoping to get around switching to Windows.  i don't like their updates very much.  where it tells you to not shut you're computer down.
Hello, this is my first time working with one of these stream laptops but I am trying to reload the OS on it due to it will not boot up, gets a blue screen with inaccessible boot device, then it will go to preparing automatic repair and stay there. I have run the extended diagnostic tools for all hardware and the hard drive past the test, so I am trying now just to do a system recovery. If I try to rest the PC with Keep my file or remove everything or startup repair, it prompts me to enter the user name password which I don't have. Also if I do a reset and choose to remove everything I get additional free space is needed on the drive where windows is installed, free up some space and try again error. Any suggestions?

I have Dell Server r510.
How to install the Operating system in it?


We did rebuild a SQL cluster with latest OS and when I try to install SQL to setup the cluster, at the service account setup step, I am getting an error RPC sevrer is unavailble. Please try again. I did make sure that all the dependenices and services related to RPC are running fine. I have no clue of what can be done to move forward with the installation. IP and cluster/nodes names remains the same, no change.

Please help.


intel i7 920 @ 2.67 GHZ

ntel Core i7-8700K Desktop Processor 6 Cores up to 4.7GHz Turbo Unlocked LGA1151 300 Series 95W

will this be meaningful upgrade for performance?
windows 62 os
will also get a newer ssd
I have Late 2014 Mac mini, which I clean reinstalled Mojave in preparation for donating to local library as a Mac OS learning tool. However, I don't remember password and don't know know how to access OS to change admin password.

Operating Systems





Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. For large systems, the operating system makes sure that different programs and users running at the same time do not interfere with each other. The operating system is also responsible for security, ensuring that unauthorized users do not access the system. Operating systems provide a software platform on top of which other programs, called application programs, can run.