Expiring Today—Celebrate National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17


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.

Share tech news, updates, or what's on your mind.

Sign up to Post

I have a lenovo a10-70f that only boots into recovery mode. I choose a command and I get the dead android logo with a triangle coming out of its stomach with a caption "no command"

My diagnostic is that the OS updated and screwed up, I've seen it similarly before with Google Play soft-bricking the entire tablet.

There is an option to update from from, does anyone know where I can get a copy of the original android image for this device? And where can I get a copy of the fastboot adb.sh file? I had it a while ago, and I lost it when my server mobo died.
Technology Partners: We Want Your Opinion!
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Hello, we encounter today with this issue from one of our macs.  We try to reinstall the osx again,  but when going to select the drive only recovery drive appears and not the local one, try to repair the hard drive by the startup disk utility,  reset the SMC but keeps jumping to the same utility,  see pictures attached. 20170919_113625.jpg20170919_113637.jpg20170919_113654.jpg20170919_113702.jpg20170919_113706.jpg20170919_113712.jpg
Thank you.
Hello All,

We are toying with implementing BitLocker on all workstations via GPO.  As usual, our wild is a couple of MacBooks that run Windows via BootCamp. Apple does not install a TPM chip on their systems, so if we were to encrypt these Windows installations, the users would need to have a USB drive connected at boot that contains the decryption key.

Does anyone know if this USB drive needs to remain connected at all times? or can it be removed once the operating system has loaded?
I recently extended a virtual disk that is used for a red hat server in ESX1 6.  What do I need to do so the Red Hat OS recognizes the new storage?
All system in domain:
Windows 7 Professional
Service Pack 1
64-bit OS

Our Nessus scans are indicating a vulnerability with the Product :
Microsoft Office 2016
  - C:\Windows\SysWOW64\mscomctl.ocx has not been patched.
    Remote version :
    Should be      :

There are two MSCOMCTL.OCX on the systems… one in the C:\PROGRAM FILES\MICROSOFT OFFICE\ROOT\VFS\SYSTEM folder which is the current version and the offending MSCOMCTL.OCX version found in C:\WINDOWS\SYSWOW64

My question is, is it safe to replace the offending MSCOMCTL.OCX with the newer OCX and if so what it the best way to do so?  I assumed I would need to unregister the OCX file, replace the old one with the new and run Regsvr32 on the newer OCX file.

PFA screenshot of found OCX files.


Has anyone run into this vulnerability and if so what was done to remediate the issue?  Many thanks in advance!
What is Citrix recommended reboot schedule for Delivery controllers ?
Hi, I am in possession of a mac from a former employee.  I can tell a new user with administration rights was created before the employee departure.  I am suspecting this new user was then used to securely delete the former employee’s user account.  The former employee would have had administration privileges on the Mac, so this would have been entirely possible.

Does anyone know if there is a log generated for this action?  Normally I would look in “private/var/log”, but I am not sure which file to look for.

I am also certain that a factory reset was not performed on this machine since the installation logs go back a couple years.

Any help would be greatly appreciated.
Hi all,

I have an old machine which has server 2003 OS with VMware version Version 1.0.10. Yes, you read it right Version 1.0.10. This hosts an XP machine which has an oracle db on it.

Long story short, I have no admin pw's for the oracle db in order to shutdown cleanly and migrate to a new machine so I was wondering if anyone has been able to convert a VMware VM to a hyper-v machine.

On our new server we are running Win server 2012 R2 with hyper-v and would ideally like to migrate to this so I can backup, monitor and manage.

In an ideal world, I would love to be able to use something like Veeam to back up the XP machine, then restore but the version of Veeam (version 9), doesn't support server 2003.

Any suggestions?
I am using Lenovo Laptop , Model NO:  G570 , When i click on any options from my desktop, it automatically points to the first file/options/folder etc. I have done the reboot of my OS to Win 7 as well, still the problem Exists.
When i use my chrome and hovering down the web page, its not moving down, Automatically, it comes to the first options of the Web page.
After Multiple Refresh of pressing F5, problem will be solved, After sometime Problem again Restarted.

Someone please help me in this Laptop Problem.
My OS is win 10 prof 64 bit and i use Google Docs to format my documents then to publish it in Google Groups.  Sometimes I have graphics and I am sure they may not show up on some pcs, and to overcome this, I thought of having a line :
To view in browser, click here.
But how do I implement this, that will take the message viewed and display in a browser.  
Thank u and regards.
Free Tool: Port Scanner
LVL 10
Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

I had this question after viewing Cent OS and Zscaler pac file.

We use Zscaler proxy pac file and I have a CentOS 6.9 physical machine that needs to get updates via yum.

password for su
vi /etc/yum.conf

press "i" to enter insert mode and added the proxy info:

proxy = http://ZscalerIP:ZscalerPort/
proxy = http://username:password@ZscalerIP:ZscalerPort/

Once I added this saved and close press "Esc" and then ":wq" and then press Enter

Then ran:

yum - y update

And it was updating just fine.

However, since the first yum updates and reboot the machine has not been able to update via yum.

To help outline what has been done so far:


Can someone please help me to resolve?

Thank you
On a server which has been working for roughly two years, we are suddenly unable to send faxes. There was an issue recently which resulted in my having to empty the queue folders and remove and reinstall all the fax modems.

Stations attempting to send a fax see the error "Unable to retrieve cover pages associated with the selected account".

If I remove the account and attempt to add it again, I get "You do not have security permissions to complete this operation"

Server os is 2008r2. Stations are all Windows 7 Pro. Updates on both are fairly current.

I've already gone through the (very few) discussion threads I found out on the web that appeared to be relevant. All the permissions for folders, services, and the fax services themselves appear to be correct as far as I can tell. I'm not seeing anything in the event logs on server or stations that appear relevant.

On the server itself, I am able to create an account in Windows Fax & Scan without issue. On the stations I am able to connect directly to the fax "printer" (which doesn't really do anything but show access permissions to the device itself, of course)
I am having strange issue on a VM when I move it to Esxi 6.5. The server’s CPU reaches 100% at OS level.
It back to normal when I move it back to ESXi ver 6.0 host. The VM hardware ver is 7. Does ver 7 hardware supports in Esxi 6.5?
I am looking to determine whether the 3rd party libraries I utilize are compatible with several operating systems, for porting feasibility. Information on any of the library/OS pairs would be appreciated.

Operating Systems:
  • HP_UX
  • Inspur K-UX

  • mpfr
  • mpc
  • binutils
  • autoconf
  • automake
  • libtool
  • cmake
  • libxml2
  • pcre
  • net-snmp
  • openal
  • freealut
  • ogg
  • vorbis
  • kerberos
  • rcs
  • gtest
  • openssl
  • opc_ua
  • opc_ua_client
  • cip_sdk
  • zlib
  • gmock
  • podofo
  • qxt
  • qtwebapp
  • kdsoap
I have a user that is having problems with his Windows 10 Start Button. I really do not want to have to re-install the OS or all of his programs. I have tried the following:
    Run sfc /scannow from Command Prompt as Administrator
    Run Dism /Online /Cleanup-Image /RestoreHealth from Command Prompt as Administrator
    Run Powershell as administrator "Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}"

This seemed to fix it for about a week. Now it is happening again. A reboot will fix it for a day or two.

Since it is working after a reboot, there has to be some program that is causing a conflict but my user has not noticed a pattern.  

Has anyone had this issue and resolved it?  Any other thoughts on a 'FIX'?
I have a single DC (call it DC1) with W2K8R2Std. Domain & forest functional levels are W2K3. Several years ago we ran adprep for Windows 2012 on DC1 so the schema version is at 56. I am not sure of the domain & forest versions. We removed or never added the 2012 server as a DC because it crashed or something. Now I want to add a second W2K8R2 DC to the domain. Do I run adprep on the second server from W2K8R2 which has a schema version of 47, or should I run adprep on the second server using the Windows 2012 disk? Can 2 DCs with the same OS operate and replicate properly with different schema numbers? Thanks for the assistance.

My company is  doing productivity project worldwide  where we are going to customers and recording their actions from start to end of their shifts which output is a pie chart that is telling us  which action or captivity takes the longest and form that we build an improvement plan if needed to reduce this time and increase their productivity.

We use excel with a lot of macros inside to perform this and we are struggling with compatibility issues with excel version & windows OS versions etc.

We are looking for a tool that is a standalone tool and is not depended on office or OS versions that can be easily modified for our needs so we can replace the Excel tool we have now

Any ideas?
Hi experts,

I am following this  link to capture an image through SCCM


But I am not able to capture image and facing below issue,

Dropbox 33.4.23 is installed on both my home and work computers--using Mac OS X and Windows 10, respectively.

Recently, to make a document-in-progress update and sync in and across both computers, I have to restart one or the other computer.  Formerly, every document save updated the file in the Dropbox folder and synced it across computers.


Free Tool: IP Lookup
LVL 10
Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

I have installed oodo 10 in ubuntu operating sytem.

i want to  install magento connector module in oodo 10.

 i have added it oodo addons folder and restart oodo server.

But module not showing under apps section in oodo administrator section.

1. I found one solution -
  i. if admin have "Technical Feature" permisssion then admin able to install module from oodo administrator section. but there is no Technical Feature option in administrator details of my oodo admin section.

  ii. i have also activated developer mode but "Technical Feature" option not showing in administrator details of my oodo admin section.

So Please help me how to install oodo module

Please help me how to install magento connector module in oodo 10
My OS is win 10 pro 64 bit and I use Outlook 2016 and have Office 365 Business Essential license.  From time to time I would like to save a particular email preferably to my HD.  Can the experts help what is the best way for me to do this, so that when I want to retrieve it will be an easy process.  Thank u.

We have around 150 remote servers have been investigating some random server crashes for some time now without success. Each remote server has a windows 2008 R2 hyper-v running on it and the host server is running server 2012. Both the host OS and hyper-v seem to be crashing at random. We are running HP DL380's G8's of varying ages. Some of the server crashes are generating crash logs, others not. For those that have (to start somewhere) i have download all of the minidumps and put into Bluescreenview. The only ones that generate a dump file all have the same bug check code BUT seems to be very random drivers which leads me to believe for these servers its not a driver problem. Also on the hyper-v we see the same bug check code as the host often which leads me to think its a software package that's common between both Hyper-v and Host.

Questions i have:
1. If it was a software package would i not see the same driver crashing the system each time or could it still be a software package but the software is using multiple drives??
2. Is there anything else i'm missing on the dump files? I have attached these for anyone who wants to have a look. Would be greatly appreciated if anyone can help.

Hopefully someone can offer me some advice here. We have had about 70 server crashes reported in our endpoint management software in the last 14 days which keeps me up at night. Once i fix the host crashing we will investigate the Hyper-V crashes more.

.iso format of bootable images are recommended for CD/DVD. Does its significance also extends to USB Flash drive, if i am imaging through USB Flash drive.
Current test setup:

On our server we run Squid proxy with basic authentication. The server has several public IPs. User connects via (example of course) IP address and to the world they appear to be browsing from the IP address. The server has also 2 other IPs - and

What we need to change:

A specific user connects to our Squid proxy IP but is assigned a random public IP from the available pool (including instead. Additionally, the assigned public IP needs to change periodically if they stay connected, for example every 15 minutes.

Can this be done? Test Squid conf file is attached, there are some legacy config values as you will see so you can ignore those, it's a test config. Server OS is Linux CentOS 6.x.

Also, to save everyone's time, please do not reply with "Why would you need anything like this?". Yes, our setup is not common, I am aware of that.
I'm trying to restore a mksysb resource defined to NIm to a different server. The rootvg is mirrored. I have two identical disks on the target that have a base os installed. I want to overwrite the rootvg with this mksysb install. This is aix 5.3 tl12-04.  After communication is established with the target and the installation process starts I get a error..
An invalid disk (00-08-00) was specified in the location field of the data file.. Looked it up and ignored this to continue the install.
When I try to continue the install with the default options.. I get another error...
Not enough disk space selected to contain the operating system.
No disks show up on the selection panel.
I only have the two sas drives that are identical in size that the rootvg was copied from.
Any suggestions would be appreciated,

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.