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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       I get a "Blue screen error in windows 7 machine" .So Automatically restart the machine every 15 minutes.Following steps are done.But still now not resolving this issue.Can you please suggest the solution.
1.SMPS changed
2.CMOS battery changed
3.Format the OS
4.Do the Disk check error & disk defragmentation
5.Selected selective startup services & stopped unwanted services
6.Uninstall the unwanted application.
7.Reduce the GUI

these are the items done by myself.What should I do? please help me
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I have a HDD that is not recognised by BIOS. Is there a way to get data out of this disk when it is not recongnised by OS and BIOS?
Had a Windows Server 2008 crash, had to reinstall OS.
We're trying to get a basic website that was on the server back up & running. Reinstalled IIS7, created website w\same name as previous. Pointed to previous data directory. Web browsers can get to default.html at the root of the directory, but once we go into subdirectories, are getting "404 - File or directory not found. The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable."
The directories and files exist; wondering if it's a permissions issue?
We've tried granting ServerName$ permissions on the subfolders, but still getting 404 error.
  I am trying to install KB2922223 on a machine which has Windows Embedded Standard OS version 7.
  When I am installing it is saying the update KB2922223 is already available on this computer. But when i see
  in the installed patches, I could not see it listed there.  And when I use the powershell script get-hotfix also it is not showing as installed. So basically though it is not installed it is treating as installed and not going ahead with installation. Anyone come across this scenario?

After an ESX host iSCSI became disconnect to our SAN's because of a Cisco switch issue, several VM's fail to power on. The error message is as follows.

Failed to lock the file
Cannot open the disk '/vmfs/volumes/5661e6ad-b2a8b7a5-a661-842b2b16cfbc/beta-2016/beta-2016_2.vmdk' or one of the snapshot disks it depends on.
Failed to power on scsi0:1.
Failed to add disk scsi0:1.

The referenced disk is a second disk on the VM. If i remote it, the VM powers on fine. If i try to add it back after booting up, same error.

I have also created a new VM from scratch with same specs and then added the OS disk and the above disk partition and get the same errors.
I'm looking at using thin clients outside of my network to connect via VPN.  All of my conventional clients use NetExtender and I'm wondering if it's possible to install and use it from a thin client running on an embedded version of Windows, ie, WES7.  Does anyone know if this is even possible?
Newbie here.

I am trying to set up shares from both windows and Kubunu to allow data transfer......
My attempt at setting up a share in Kubuntu using Konsole, has resulted in a "shareFolder" in the desired location. I have set an smb password - all good.
Have "checked" the folder settings using the Kabuntu GUI and permissions and sharing seem to be set OK.
However from windows - can see and map to the folder - permissions (using the username / password combination) set up - fails to authenticate.
Set up a shared folder in Windows - but Kubunu does not see the folder when I am try to "map or discover" from Kubuntu.
So two issues here.
Windows to KUbuntu - permissions issue - as I see it,
Kubuntu to Windows -probably needs to be re-set up.

Running Win10 - latest
Kubuntu - older(??) flagging an Os update - though this is probably irrelevant in this scenario.

Any wizard out there willing to take on this onerous task?
All assistance gratefully received.
We have a server 2008 R2 server with SQL server 2008 R2, running 16 GB of memory, 64 bit OS, Xeon X340 @ 2.4Ghz.

All resources are funnelled towards the SQL application, we seem to have intermittent slow down and performance issues where the Disk queue jumps up to 2.95, IO is 10 MB/Sec

System PID 0 is using the most total Bytes per second of: 8,720,200

Heaviest disk IO is the SQL application itself.

This only seems to happen sporadically two or three times a day, and I haven't been able to correlate it to any specific task or backup job running during that period of time.

This SQL server services multiple sites with users directly accessing the database (no terminal server or replication to local SQL). And all users are affected by the performance issues.

The disk speed is 7200 RPM and the server hosting them is from 2010.

Any ideas?
A few months ago, I installed Dropbox desktop sync app on a Windows 2008 Std server. It was installed, and ran smoothly until few weeks ago when Dropbox service stopped working and prompted me to upgrade the version. Since then, Dropbox is not installing on that same server. Anytime, I am double clicking the installer, it is opening the statup window and the "disaapearing" .... without any error message

I understand, Windows 2008 is not a compatible OS for Dropbox... but not sure why the previous version worked at the first place? Now that, I have both new and old versions, both of them are not installing also no error message . Where can I find what's wrong going with the installation? Please advise.
Both the C: (OS) partition and D: (Data} are RAID5, the C: has three failed drives, actual error is "foreign." I have a backup but would rather install the OS again and reconnect to data, I don't believe this will be an issue, if so please advise.

It's a PowerEdge Server, having a hard time getting the CD to boot to configure the new drives and install the OS on the C: partition, any help here is greatly appreciated.
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Dear all,
How can I develop operating system like window,linux in userspace.

I think it is possible if I can load the elf file or .exe file in memory from userspace.
Just using any C/C++ compiler. No reboot,no floppy,no image nothing,no VM etc. What's your thought.
Client's PC. Dell. Win 10 (originally upgraded from Win 7).

Comes up with the typical error "Automatic Repair" "Your PC did not start correctly"

I have tried three available restore points and the Advanced Options "startup repair".  No success.

Can't think of anything else to try, Apart from the Windows Reset option, but then the client loses all programs, although the data will be retained. Any ideas welcomed.
What is the correct process to follow to create a .CSV file containing the first names, last names, usernames, & passwords of users to import into Server 2016 Active Directory?
New install of server 2012 64bit,  not a OS upgrade, but old server data such as program files still on the 'c' drive.
no problems during the install, no yellow flag warnings except for "AD Rights Management" needs post configuration.
Rolls installed are AD, DNS, DHCP, as a full secondary domain controller,  application server, and file server.   I did not ask for IIS,  but got it anyway.   A pop up window keeps asking to install .NET 3.5.   NO changes to group policy.  
A funny thing about the folder share security;   the double head icon does not show up on C drive but does on the 'D' drive.
Configuring share security on 'D' is normal,  I get the groups I want.   On 'C' it configures the way I want,  but is erased by the next logon.  
My OS is win 10 pro 64 bit and I had this Dymo printer for a long time, only using it iintermittently.   First it was the paper jam, which I managed to clear it, and now the print head does not print.  It just feeds paper out off the printer.  How does one fix this problem.  Thank u.
I am trying to upgrade Exchange 2007 from SP1 to SP3, I followed the Microsoft documentation (disbaling antivirus etc) and I always run into the same error when it reaches the "Hub Transport Roles". I get a popup with "ExsetupUI.exe has stopped working" with following details.

  Stopped working

Problem signature:
  Problem Event Name:      CLR20r3
  Problem Signature 01:      exsetupui.exe
  Problem Signature 02:
  Problem Signature 03:      4be1ee5d
  Problem Signature 04:      System.Management.Automation
  Problem Signature 05:
  Problem Signature 06:      4acfac13
  Problem Signature 07:      2dca
  Problem Signature 08:      23
  Problem Signature 09:      FatalError
  OS Version:      6.0.6002.
  Locale ID:      3081

Emails are still working, its just the POP and IMAP services arent, everything else seems fine. When I try re-run the update it continues on @ the Hub Transport Role part of the update, then fails soon after.

I have tried everything I can think of.
Antivirus Disabled... then completely uninstalled
.Net Reinstalled number of times
Running elavated
Downloaded the installer again from microsoft
Tried SP2, got the same error at the same point
Even loaded a backup image to a different server and tried a bunch of riskier things, but still always getting that error.

Does anyone have any ideas?
I am reimaging some Dell Latitude 3350 laptops with the reimage/boot device given to me by my predecessor.  It works fine until I try to boot it up.  Then I get the infamous blue screen with a message indicating that this file is missing: \WIndows\system32\winload.efi

ANy thoughts?
Hi we have a client with mixed OS versions.

DC = Server 2012 r2
App server = Server 2008 r2
RDS = Server 2012 r2

DC migrated from 2003 to 2012 r2

Guide followed : Link

I have tryed many solutions to the problem but nothing has solved the issue. Since we are getting Kerberos messages i tried the standard to synch time servers. But to no help. Only thing that fixes the problem temporarily is rebooting the server.

Some of the errors are :

The processing of Group Policy failed. Windows could not authenticate to the Active Directory service on a domain controller. (LDAP Bind function call failed). Look in the details tab for error code and description.

Open in new window

Additional information : ID:4, SOURCE:Microsoft-Windows-Security-Kerberos
The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server dc$. The target name used was ldap/DC.XXX.local. This indicates that the target server failed to decrypt the ticket provided by the client. 
This can occur when the target server principal name (SPN) is registered on an account other than the account the target service is using. Ensure that the target SPN is only registered on the account used by the server. 
This error can also happen if the target service account password is different than what is configured on the Kerberos 

Open in new window

OS : Linux

Let us suppose - we have 2 directories,
path1 : /prod/dir01/dir02       path2: /dev/dir01/dir01

If I refer  path1,  that should automatically should take it to path2.
Can it is possible to make it work in Linux ?

please advise.
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A customer brought in an HP Laptop. The issue as described by the customer: The laptop randomly shut down one day, when she turned it on said that the OS was missing files required to boot. The customer proceeded to do a recovery. When the recovery was finished the computer turned on and had an error related to heat/ CPU fan (I saw this error when I first turned it on at my shop). The laptop would continue to not load into windows.

My process:
I first opened up the computer and cleaned all of the dust and hair compact that was in and around the fan and heat sink prohibiting the computer from properly cooling (there was a significant amount it). I removed the heat sink itself, cleaned both it and the processor, re-applied fresh heat sink paste, re-assembled the computer. I did a fresh installation of Windows 10 - installation completed successfully, booted into Windows as would be expected. Proceed to do windows updates, laptop randomly restarted and proceed to continue looping through the automatic repair. The issue seems a lot like hard drive failure to me so I removed the hard drive and tested it - it tested good. However, I was still suspicious and thought maybe hard drive so I installed a test hard drive, re-installed windows 10 - as before, the installation completed successfully. However, almost immediately got stuck in the loop again.

I am not getting any error messages. I am not sure if there could be some sort of intermittent power failure on the board - or…
Say, I've a senior citizen with a somewhat shaky hand.
Are there any mice specifically adapted for senior citizens with shaky hands?
It needs to be available in South Africa or by shipping at reasonable cost.

Voice Commands is another avenue to explore. The OS is Windows 10.
Can you send a good demo of how the mouse control would work?
Is the Google Voice device available in South Africa?
Hello Experts,
Installed IBM Cognos Express Xcelerator Client (x86) on a Windows 7 X64 OS running Office 2010 x86
Get the  Run-Time Error 53 - File not found: tm1xl.ocx as per screen shot
Run Time Error
I’ve registered tm1prc.dll tm1xl.ocx as per online articles I’ve come across, and still not able to resolve, the application was installed on the client as a local administrator.

Can you please provide some assistance with getting this resolved.
Hello there,

I"m reviewing the 802.1x's microsoft implementation to get handle on it  and consider its possible implementation in our environment. At this moment we don't have a domain, as a matter of fact we're mostly macs with no network os. I've been reading Microsoft documents and it seems to me 802.1x can be implemented without joining the computers to domain.  I've found quite a few hurdles as i keep reading and testing this so i figure it'd be a great idea to pick someone else's brain...
First, can i implement NPS in a non domain mac environment  environment? Should i consider open source for radius instead?
If any of you have implemented it, is there any lessons you would like to share with me as keep testing.

thanks for your help..
Dear Team,

There is port already open between  Source -target servers.
i have tested the same using telnet command.

However while I am creating some Datasource in Application server, i am getting  the above error message.

Kindly let me know if there anything required  at OS/App servet/network side .

Kindly advice
=== ERR MESSAGE IS =========
<Aug 7, 2017 4:52:24 PM AST> <Warning> <Deployer> <BEA-149004> <Failures were detected while initiating activate task for application 'test'.>
<Aug 7, 2017 4:52:24 PM AST> <Warning> <Deployer> <BEA-149078> <Stack trace for message 149004
java.rmi.RemoteException: [Deployer:149150]An IOException occurred while reading input.; nested exception is:
        java.net.NoRouteToHostException: No route to host
        at weblogic.deploy.service.internal.transport.http.HTTPMessageSender.sendMessageToServerURL(HTTPMessageSender.java:343)
Hello Experts, I have a Toshiba Satellite L655 that I use to play movies for the kids.  It has been working well and playing movies with no issues for several years.
The OS is Windows 10 Home on a x64 processor.  
After a big Windows update, the DVD player will not play any of DVDs.  The error I get is "Unsupported video type or invalid file path."  I've done some searching but so far nobody seems to have a solution.  Any help 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.