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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Dear Experts,

I took over the maintenance of a Windows Essentials 2016 server last October 2017.  The OS was already installed on the server by a previous employee, who is no longer with the company.  In December 2017, the hard drive crashed; fortunately, I was able to recover, re-install the OS and not lose any data.  However, since the re-installation, the OS is always asking to be activated.  The ex-employee, who installed the OS, was let go before I could retrieve the activation key.  Unfortunately, when the ex-employee purchased the software, his personal email account was used and not his business account.  I contacted the company that Windows Essentials 2016 was purchased from, and obviously, they could not give out any information, which is understandable.

Question:  Is there anyway that you know of that could help me retrieve the activation key?

The OS must know that it was previously activated because since the re-installation of last December 2017, the server has been running perfectly fine.  The OS has not stopped running due to an expiry activation code; the server hums along with no issues (Thank God).  The only issue (which so far is a non-issue) is that on the desktop in the lower right hand corner it says "Activate Windows   Go to Settings to activate Windows."  I know I have dragged my feet in the getting the activation code entered; but, I don't know how to retrieve it.  I want to get the OS activated before it comes back and bites me.

Bootstrap 4: Exploring New Features
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Bootstrap 4: Exploring New Features

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What is the process to connect a Mac OS X laptop to a remote Windows network using the Always On VPN?
Hello Community Members…

I had "PINNED TABS/WEBSITES" on Edge browser yesterday got a Windows update and NOW no pinned tabs…

The "Set Aside Tabs" are ALL fine AND ALSO the pinned tabs on the Task Bar…

I have Windows 10 Home Edition V1803 OS Build 17134.285


All help VALUED with My current enquiry

Best Always

Paul M
My laptop is going and I bought a replacement.  Long time ago I upgraded to Win 10.  I don't have any software to reload the OS with Win 10.  Using Belarc software I know my key code but I think that is the one from Win 7 I originally had on laptop.  What can I do so I can load the new hard drive
Hi Experts.

I'm setting up iptables for a system so I want to ask if there is any rule/module that can prevent SQL Injection on iptables.

Thanks for reading this.
Hi Expert,

I am new to VirtualBox, I have installed a Mac Sierra it prompts me that I am in guest os, then my mac os asks me for an administrator password. I would like to check how come I am In Guest OS Supports? Did I done any step wrong? My windows account is already an admin and 64 bits laptop. Any way to remove guest and have only administrator right?

Appreciate if anyone can assist me on.

Can someone provide the name of some open source software that can assist with web utilization, os utilization virtualization and security vulnerabilities. It does not have to be all the same software. This is for linux and windows OS.
Afternoon all,

So, after finding out how bad it was at this new role when it came to updating their firmware and hosts, I've now got the pleasure of doing it. They have accepted that it's pretty bad but we're also running a version of 6.5 from November 2016........

So, my question is this, I need to know the best way to update these boxes, I'm doing the entire firmware stack for all the hardware and then grabbing the latest esx 6.5 version and then bashing through the entire cluster.

I'm thinking this

Drop the server into maintenance mode, actually, manually move off the VM's and then go to Maintenance mode. I put one in 3 days ago and it purple screened.

NExt up, update the hardware BIOS

Then update the OS

Bring it out of maintenance mode

Move the VM's back, move onto the next host. Rinse and Repeat.

Is this is the best way to do it or is there a better way?

HI there,

 Does anyone knows how to reinstall an operating systems in VMware VM? i have a VM running on ESXI and i don't want to remove the VM and recreate it so that i can install a operating systems. Is there any way or step that i can do just reformat and reinstall the OS on an existing VM?
I have created a Ubuntu VM from Azure Marketplace. I have also select the 30GB as OS storage. When I login to the my storage account. In the blob service, I can't find the actual .vhd file container. it only has the contain name as bootdiagnostics***** which stores one .log and one .bmp files.

When I check the OS disk, the source image is "Canonical / UbuntuServer / 18.04-LTS / 18.04.201808310", is not pointed my storage account.

My question is where the OS disk  actually stored.

Thank you in advance
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I want to move from FTP to HTTPS due to Firewalls being nasty to FTP.
For HTTPS I will need a SSL Certificate.
   Can I get free valid certificates anywhere ?
   Should I distribute my certificates while deploying my Application ?
I use Delphi (ICS HTTPS component) and my application runs on Win OS.
I have developed a backup application which is installed on every machine of my customers.
The HTTP Server will only be installed on the Destination machines and monitoring machine.
I have 2 vms running on esxi 5.5.0 Server1 and Server2. Server1 had problems so we restarted the server. We found that when server1 that is restarted it just continues to boot os but unable to do so. We restarted server2, also noticing that server1 one was able to boot as well. After a while both were ok. Both server are windows server 2012

I need to find the root cause of this issue what should i be looking at? What should i do to solve this issue?
Is there a way to change the Guest Operation System via CLI without damaging the VM?

I am getting this error:

The configured guest OS (Other (64-bit)) for this virtual machine does not match the guest that is currently running (Red Hat Linux 6 (64-bit).  You should specify the correct guest OS to allow for guest-specific optimizations ..

I selected other since I didn't know the OS format of the ISO image that I loaded and now I am getting the error after the VM is deployed with that ISO image and has some configuraiton.

When I try to go to edit settings under VM Options, General Options and Guest OS, it is greyed out and I can't select the other OS.  Do you know if there is a way to change this (through CLI perhaps) without having to re-image and recreate the VM again?
What realistically is the risk if somebody found out an internal server name from the outside, e.g. what may it allow them to do in terms of a security attack. I am talking about from the outside. I noticed in some documents available on our website there is some mention of internal servernames and need to quantify the risk, they are not accessible to anyone outside the organisation, only those internal to the company, but it still doesn't sit easy.
Hi Experts,

In a CL I collect information about *.CSV files in a specific IFS map.  /mypath/*.[Cc][Ss][Vv]
The output is redirected to an existing file /QSYS.LIB/PRODLIB.LIB/MYFILE.FILE/MYFILE.MBR

On our developementserver it worked fine.

Now we transfered the software to the testenvironment on the production server
And it still works as expected.

Once we tried it on the Production environment, it stop working, (the  /PRODLIB is located on ASP1).
so I added  /IASP1 to the path,
and still get the error:
qsh: 001-0055 Error found creating file /IASP1/QSYS.LIB/PRODLIB.LIB/MYFILE.FILE/MYFILE.MBR. No such path or directory.
I have maybe 50 Win 10 PC at home user clients...
I want the Win 10 machines running as clean as possible...with no Microsoft metrics...privacy settings etc...

Previous to v1709 I was turning off some of the obvious stuff I didn't need...

With v1803 I got a lot more aggressive in turning stuff off...
Then it seemed to me that some of the v1709 stuff that I turned off got turned back on when they
were upgraded to v1803....

Now I'm turning off everything I can find...
Basically I uninstall every thing I can other than core OS stuff...
I turn off all privacy stuff I can find...where ever in setting anything might be located that I can turn off without
hurting performance...
I have a regedit to block wannacry...
I disable cortana...
I use Classic Shell...
I block third part junk offers...
And I would love to get rid of all Apps...

And other stuff...
This takes a while...and I work off a check list so I don;t miss anything...
And I add to this list from time to time...

Redstone is coming out this fall...and I'm worried that that upgrade will eliminate all my
hard work and re-establish everything I've turned off or uninstalled...

Assuming I am correct about Redstone...does anyone know if there is anyway to block
the Redstone upgrade from re-establishing everything...???
I am having problem with my virtual box computer I download the right version for my machine, its 64bit System right my virtual box installs nicely. But adding the OS like the kali Linux is give me an error
Good morning,

I'm running out of disk space the c-drive of a Windows Server 2008 R2 Std Sp1, with 8gb ram, 64bit OS.
I have of 12.5gb of Windows update files that can be deleted. When I use the Disk Cleanup tool to remove
the files, it takes approx. 12 minutes to go to the process, but the windows files are not removed leaving me
with the same problem I started with. Attached I have included the screenshots of the whole Disk Cleanup

Is there something else I can do to get rid of the Windows Update files? I have another drive on the same server
with 427GB free space.

Thanks in advance for your help,

hello i have a mining program running on W10pro which crashed from time to time. the OS appears fine and other application continue to run but the mining program will close.

i'm looking at all avenues of fixing this is the long term but as a short term fix i'd like help putting together a bat file that will do the following:

on OS boot up start MyProgram.exe automatically

If MyProgram.exe appears to close wait for say.... 30 seconds and restart MyProgram.exe
Become a Microsoft Certified Solutions Expert
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Become a Microsoft Certified Solutions Expert

This course teaches how to install and configure Windows Server 2012 R2.  It is the first step on your path to becoming a Microsoft Certified Solutions Expert (MCSE).

I would like to capture the screen shot of VxWorks-based panel or windows. In MS Windows, we can do it by pressing <Alt> <PrtSc> at the same time. But how can I do it at VxWorks?
How to measure disk I/O throughput on a Linux OS. Any good tutorials on Sar, Iostat, etc would be highly appreciated.
My company has setup an Ubuntu 18.04 server, to exchange files with a client, via SFTP.  We need a high level of security.  We're trying to require authentication with SSH key pairs, AND the Linux OS username and password (not the SSH passphrase). We've got the key pairs working, but it doesn't ask for the password. I'm assuming we're just missing something in the sshd_config file. Hopefully we're not trying to do something that's not possible. Any assistance would be much appreciated.

I am having printing issues when printing a document or test print to local printer or network printer.  I am getting an access denied.
I have look at other posts but none seem to answer my question.
OS - Windows 7 Pro 64bit
Does not matter who I login as - domain user, local account, admin account all get the same error.
I have deleted all printers, deleted all printer software from programs and deleted printer form print management.
Re-installed the local printer (USB) first from fresh download, updated the firmware on the printer  with no issues.  Once I attempt a test print or print from program get the same issues.  I cannot print to a file using Adobe print either.
i have 2 hosts on vmware cluster ( vcenter 6.7 and esxi 6.7)  ..  I want to achieve the below scenario

vm1 will be on host 1 ( vm1 will be Primary server )    , IP : (e.g.)  
vm2 will be on host  2(vm 2 will be Secondary Server) ,IP : (e.g.)

both will be identical

I want my users to login to this ip (e.g.) as interface for the above IPs  so when any kind of problem happens to host 1 it directs them to the second host

can this be achived through vmware ?
or it should be done from os side ? ( using linux redhat and will use  pacemaker cluster)

thank you
I have an early 2008 Mac Pro tower (upgraded Ram & Video) using El Capitain plus a Bootcamp 6.01 Win7 installation on a Separate internal HDD.

I want to install a new Win7 partition on my Mac OS HDD (250 GB of free space) while maintaining my existing Win7 installation on its separate drive.

Thus, I will end up with 2 BootCamp Win7 partitions, one new and the other old and worn out.

My purpose is to create a Fresh Win7 installation to which I will gradually copy and reinstall 10 years of Docs & Applications from my existing over-taxed Win7.

Where do I begin?  I assume I need to create a new Bootcamp partition on my Mac OS HDD, currently a single partition.

Just not sure of the best way to go about that without screwing up either my Mac OS or existing Win7 installation and data!



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.