The layer between your hardware and software. It manages disk input/output, memory allocation, graphic acceleration, hosting device drivers and various other resources.

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0answers
23 views

OS agnostic analog data input

I want to input an analog signal (for concreteness, temperature from a thermocouple) into a computer. The sampling rate should be at least several times (say, 10) per second. Moreover, I want to be ...
0
votes
0answers
164 views

Hardware Support for Paging

The address consists of 16 bits, and the page size is 8KB. The page table thus consists of eight entries that are kept in fast registers. How do we get the total entries in the page table as 8? ...
0
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1answer
71 views

Extra Program Files folder in Win7 and its removal

A WIN7SP1 on a Dell laptop showed an extra Program Files folder ('Programme' in German language version). How to get rid of it? The Dell laptop is from Ebay and the OS seems to have been flashed on ...
2
votes
1answer
83 views

Maximum virtual memory and physical memory

A Intel 64-bit x86 CPU,four-level hierarchical page table.Each for levels of page table can contain 512 entries, and the page size is 4KB. What's the maximum size for virtual memory and physical ...
0
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1answer
39 views

Block unwanted change in system time on windows

I don't want users to be able to change the system time. For this, I have set the Group Policy "Change the system time" to include only my Administrator account. I want to know the validity of this ...
1
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0answers
26 views

How can cpu-intensive processes slow down a system despite having a scheduler?

I've encountered it on both Windows and Linux that if some process is doing some heavy work and the cpu is under a lot of stress, the whole system can sort of freeze, other processes get slow, etc. ...
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votes
1answer
154 views

Why do people still make 32 bit software [closed]

Why do companies like Microsoft still make 32 bit operating systems, when everyone have at least a dual core CPU? Why do software developers release 32 bit versions? I want to know this since I don't ...
0
votes
0answers
30 views

Installing Ubuntu in a new computer

I recently purchased a ThinkServer TS140 (Intel i3-4130; 8GB RAM, 1TB HDD). It comes without any installed OS or drivers. How do I install the Ubuntu OS in this computer? I tried burning the Ubuntu ...
1
vote
1answer
239 views

MAC equivalent - user name & appdata

I have a couple of questions: On PC I can get the username from the environment variable USERNAME and on LINUX it is USER - what the MAC equivalent? The users local area on windows can be found via ...
1
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1answer
316 views

Windows 7 won't create Administrator account

Win7 REFUSES to login to newly created user account, logged in as admin creating 2nd admin account. The account creates fine, but always goes into a "roaming profile" login. Have deleted, and ...
1
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1answer
39 views

Should system path & user path match?

This morning I was trying to add python to my windows 7 PATH and used: setx PATH "%PATH%;C:\python34\" /M This seems to have changed my path but not in the manner I'd hoped! My user path now ...
-3
votes
1answer
41 views

Why are the file formats different?

When you go to a certain site to download an application. why can't you run the same file formats for different operating systems?
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0answers
51 views

Ubuntu as a separate OS v/s Wubi

Due to some hardware problem, I am unable to use both my DVD drive and the bootable USB stick to install Ubuntu as a separate OS alongside Windows 7. I came across WUBI. I was wondering if there would ...
0
votes
1answer
740 views

Serva Login 0x35 NetPath not found, wrong credentials, or unreliable net

I'm trying to install Windows 8 via PXE network boot, I'm using Serva for this. When I get to the ServaPENet screen on my client I can't connect. Drivers are installed (I tried three different ...
1
vote
2answers
58 views

Is there any way to install any linux distro without acesssing the bios? (broken screen)

I am trying to run a Linux system from my y500 Lenovo ideapad but I can not access the boot menu or bios at all. This is because I have a broken screen and am using an external display to make use of ...
0
votes
3answers
147 views

I'm not able to connect with SSH because of SUID warning

When I try to connect with another machine, after this command below: user1@host1:~$ ssh user2@host2 user2@host2's password: I receive: WARNING: Your password has expired. You must change your ...
0
votes
0answers
20 views

iMac not letting me log in

I have a iMac OS. Last night it locked up on me. I powered it off and when I started it back up, it goes through the start up process and then it gets to the login page. I click on the icon to ...
0
votes
0answers
22 views

Is it possible to bring up the OS without any displays on an armStone A9? [duplicate]

How to bring up the operating system on an armStone A9 without any additional displays, but just via LAN cable? My network setup looks like this: Details: PC (machine 1): Ubuntu 14.04 LTS / ...
0
votes
4answers
659 views

Reboot and select proper boot device error after changing partition table

I have a problem with starting installation of Windows from a pendrive onto my Samsung NP700G7C-S01 laptop. Here are things which I did: I formatted all disks on my laptop via GParted from Ubuntu on ...
0
votes
2answers
2k views

Is it possible to re-install an operating system over an encrypted system?

Scenario: I buy old PC/laptops, fix it and then resell them. I recently got a laptop at an auction with the whole system password encrypted McAfee Endpoint Encryption. Windows does not even load. I ...
-1
votes
1answer
62 views

Can’t format Linux partition after reinstalling Windows

I was using 2 OSs, Windows 7—installed on C:—and Ubuntu—on a 60 GB partition next to G:. Now, I changed the processor and motherboard and reinstalled Windows. Ubuntu was left untouched. When I start ...
1
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1answer
74 views

Building a small home server [closed]

Good day everyone. I am not sure if this was the right forum on stackexchange, but I found it most applicable. I have quite an old PC (currently running Untangle, but not needed anymore), with ...
0
votes
1answer
107 views

Ho do I build and use a portable Windows OS environment for developers?

I am a developer and use several applications, tools and programs on my Windows 8.1 machine. I work frequently from home in addition to the office. Currently, I use one souped-up laptop that has all ...
0
votes
4answers
57 views

Uninstalling windows 8 and then re installing it, how does it work?

So my PC has an activated version of Windows 8.1 and i was thinking of changing my OS to Zorin to see if i like it, if i decide i don't like it is there anyway i can get back Windows 8.1, if so how ...
0
votes
1answer
52 views

How the desktop identify the correct time when power on the system

I bit confuse with how the desktop identify correct time when i power on again, i was surprised how it happen? is there anything run even when i power off the system? Let say in my time it was 7.30 ...
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votes
3answers
66 views

Why am I unable to use my Windows 8 after installing Windows 7 in a separate partition?

Previously I had dual boot I.e, Windows 8 in G:drive and Windows 7 in C:drive. Since I had slow performance in Windows 7 I had to remove and re-install Windows 7 again in C:drive. so while starting ...
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votes
1answer
115 views

What's the best Free OS available right now or soon will be? [closed]

My only familiarity is with win7. I'm looking for best new os system. That is light and fast, and can do everything. I have heard about ubuntu. But don't know if it's the best out there. So i want ...
0
votes
2answers
283 views

Computer claims operating system not found but the hard disk drive is fully operational

I’ve got this Dell XPS 15z laptop laying around with a broken hard driving. I swapped the hard disk drive (same format) of another laptop for an SSD. So I thought I could try to make it work again by ...
0
votes
1answer
42 views

Formatted PC wont boot from CD

I cleaned the HDD of an old PC with Hiren Boot CD to make a DIY server and it worked fine. I now have very clean hard drive. The problem is when I tried to put an iso of ubuntu server onto the machine ...
1
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1answer
2k views

What is “NT AUTHORITY” and “NT SERVICE”

I can find many info on what is "NT AUTHORITY" slash "something". Same for "NT SERVICE". But not for the part before the slash. I run into them from time to time in my work. I might receive ...
4
votes
1answer
117 views

Does Operating System modify BIOS in any way?

I am reading the book: How Computers Work: The Evolution of Technology and in Chapter 4 the author says: The operating system does not work alone. It depends not only on the cooperation of other ...
0
votes
1answer
90 views

Cant load any os installation on laptop

So I have downloaded Kali operating system and checked on my main computer (not laptop) if I burned it correctly to the DVD. The disk was running fine and the os installation showed up. However, when ...
0
votes
0answers
27 views

Install Windows 7, keeping pre-installed Windows 8 (dual boot)?

I have a Samsung notebook with pre-installed Windows 8: how can I install Windows 7 in dual boot? I have read there might be some problems, since Windows 8 runs on GPT partitions, and Windows 7 might ...
2
votes
3answers
6k views

Windows 8.1 shows activated in computer property, but i encounter message saying 'windows will expire soon'

I have got my Lenovo Z50-70 about one month ago with Windows 8.1 Installed. It keeps flashing the message 'Your Windows will expire soon' But when I check activation status it shows me its ...
0
votes
0answers
49 views

Edubuntu stuck on installation

I've had this problem using multiple discs on multiple drives on this one computer. I'm trying to install edubuntu 12.04 on an old desktop. It boots to the disk, I select english and then "install ...
0
votes
0answers
19 views

Why do UIDs start at 0 but PIDs start at 1 in Unix?

During a discussion of Unix operating system concepts, the question was raised, and no one really seemed to be sure. It seems against "the Unix Way" for things to be inconsistent that way, yet it ...
0
votes
0answers
76 views

How to transfer OS from failing hard disk to new external drive?

I have an old Vista Laptop whose hard disk is failing. For various reasons I must have the same exact system back again. I copied the entire OS on the C drive over to a new external drive and made it ...
2
votes
1answer
1k views

Connecting to host OS database from guest OS VirtualBox virtual machine

I’m using Pentaho BI server in a CentOS VirtualBox machine, and now I want to connect it to an SQL Server database that I am running in my Windows host OS (localhost). Is there a simple way to do ...
0
votes
1answer
176 views

how to enable pci hotplug support in ubuntu 13.04

Kindly help. I have a pci-based wifi adapter which is not getting detected when i plugged it into the laptop. OS: Ubuntu 13.04 Kernel version: 3.8.0-19-generic
13
votes
4answers
339 views

Which multi-user operating systems allow a user to see the current command line of other users?

I was reading the manpage of unzip, and ran into the following -P password use password to decrypt encrypted zipfile entries (if any). THIS IS INSECURE! Many multi-user operating ...
0
votes
1answer
21 views

Time Machiine Volumes owned by root

I recently set up time machine to back up to two external USB drives. backups are proceeding fine, but the drives are owned by root and I can't access them via "enter time machine" or via normal ...
3
votes
2answers
27k views

Booting from USB with UEFI bios to install Windows 8.1

I have a Lenovo 11e Yoga laptop. I have installed a new, blank SSD in the system and now I want to reinstall Windows 8.1 (which is what the laptop came with). I created a bootable USB stick using ...
1
vote
1answer
94 views

Prompting for sudo password in a setuid root binary

I have a setuid root binary, with_sudo.bin, with the following source code: /* with_sudo.c */ #include <stdio.h> #include <sys/types.h> #include <unistd.h> #include <stdlib.h> ...
1
vote
1answer
137 views

AMD processor families and models

I want to use hardware performance monitors on my AMD Opteron 6376 processor. Unfortunately, AMD has many manuals and I can't figure out which one I need from this (partial) list: ...
6
votes
1answer
140 views

How do non-realtime OSes capture audio without dropouts when sample rates are so high?

If I plug a line or USB microphone into my PC, I can record audio at 44.1kHz. That's one sample of audio about every 23 microseconds. The audio wave must be sampled and played back precisely or it ...
1
vote
1answer
93 views

After formatting External Harddrive, Why do hidden OS folders $RECYCLE.BIN, System Volume Information get created

My antivirus ESET Nod 32 was flagging up a virus found in my C:/$Recycle.bin folder, after reinstalling fresh OS I decided to store some things on an external Harddrive and dumped to another PC. My ...
0
votes
1answer
60 views

Why can't I install any OS on samsung

I have laptop call it SAMSUNG OS: WINDOWS 8.1 UNILINGUE 6 BITS (6.3 VERSION 9600) Model: 300E5E/300E4E/300E5V/300E4V BIOS: P02RBE i'm trying to install any OS on it but no luck even i use usb ...
0
votes
1answer
34 views

Can't boot to the original windows 8.1

After purchasing an SSD, I decided to install Windows 8.1 on it. I originally had Windows 8.1 on my Western Digital Hard drive. But now, I cannot boot to it and there is no option to select an ...
0
votes
0answers
22 views

Not showing bootmenu

I had both Ubuntu 12.04 and windows 7 on my Hp desktop and it was working properly.Now the problem is when I tried to boot the system it is not going to the boot menu instead it continuously blinks ...
0
votes
1answer
111 views

windows 8 boot error

Hi I am using Sony Vaio laptop with windows 8 OS, when I power on my laptop blue screen appears and it says your PC needs to be repaired, a required device not connected or cannot be accessed Error ...