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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1
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1answer
6k views

Redirecting or routing all traffic to OpenVPN on a Mac OS X client

I have configured an OpenVPN (2.2.1) server on an Ubuntu virtual machine in the Amazon elastic compute cloud. The server is up and running. I have installed OpenVPN (2.2.1) on a Mac OS X (10.8.2) ...
12
votes
4answers
7k views

How does USB device recognition work?

I'm curious how USB device recognition works in Windows. I imagine it's something like this: When you plug in a device, it tells Windows "here's my device ID to tell you what I am" Windows looks to ...
1
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1answer
3k views

Aspire V5-531 Operating System Not Found

I recently purchased an Acer Aspire V5-531. I replaced the 320GB HDD with a 120GB Kingston SSDNow V200 and installed Linux booting with rEFInd. Due to a necessary change, I have to move back to ...
0
votes
1answer
3k views

Reclaiming an old school Chromebook

In the middle school I go to, we use chromebooks. They are "managed", so we cannot change or do anything to the laptop we are not allowed to do. One of my friends recently left the school. Since he ...
-1
votes
2answers
36 views

Second desktop other OS

I want to Dual Boot Windows 10 and Kali Linux. That is not a problem, but I don't want to turn off my PC to get into Kali Linux. I want that if I'm on Windows 10, Kali Linux is in the second desktop. ...
1
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2answers
815 views

Operating system not found after downloading skin pack

My brother has downloaded a executable file from Skin Pack — I believe it was the Mountain Lion IO6 skin pack. He's using an Acer Aspire 553G. And now his operating system won't start (Windows 7). ...
0
votes
1answer
16 views

Removing partitions from Chromebook (Chrome Recovery Utility not working)

I dual installed GalliumOS and ChromeOS on my Lenovo 100S ChromeBook. I tried to uninstall GalliumOS but didn't manage to delete its partitions. Now I have ChromeOS installed, but it has under 1 GB ...
0
votes
1answer
56 views

How to remove all the apt-get packages and updates since installation in Ubuntu 14.04?

Iam working on a new project and i some what messed things up in the operating system and i unnecessarily installed and updates some packages.So i cant figure out which packages i installed,so i have ...
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votes
1answer
23 views

What is variable length instruction, What is its importnace in 32 and 64 bit OS [duplicate]

While reading about 32 bit vs 64 bit OS i came to know that there is instruction length varies from 32 bit to 64 bit. What actually it means and what is its importance?
1
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1answer
27 views

Is there a difference CPU Clock and Instruction Clock?

I am a bit confused between CPU clock and instruction clock. I brought the following figure from this source as illustration. Does instruction clock imply the time it takes by the cpu clock to execute ...
5
votes
9answers
79k views

How to Install Windows XP over Windows 7?

I have a Dell laptop that came pre-installed with Windows 7. When I try to install Windows XP on it, Windows 7 does not allow me to. I don't want a dual boot system, I just want Windows XP on my ...
0
votes
2answers
19 views

Can I run freepto or tails or Subgraph OS on rasberry pi?

I am new to the pi, do you guys think I can I run freepto or tails or Subgraph OS on the pi? Since some of them are linux based I thought I would give it a try, but dunno. Thx in advance for your ...
0
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0answers
16 views

Changing the Interrupt Vector Table [migrated]

During one of my university lectures we were talking about hooking and the possiblitity to change the interrupt vector table (IVT). Our professor said that a program with root permissions is able to ...
-3
votes
0answers
9 views

How to lock yourself in a tab in Safari?

I wish to lock a tab for a certain amount of time on safari. I want this tab to only take up one desktop but not let the window open any other tabs. This is to prevent me from being distracted and ...
0
votes
1answer
39 views

Solaris T5120 How do i got about installing OS

I have a Solaris T5120 it has a DVD Drive i am new to Solaris or specially with the servers that don't have display port to connect a monitor. So when i power it on i am not sure what to do ...
3
votes
1answer
113 views

USB does not boot when trying to install Linux on my Asus EeeBook X205TA

I already made this question on the AskUbuntu (link) community, but had no good answers/help. So, here I am. I am trying to install Lubuntu on my Asus EeeBook X205TA that came with Windows 10 Home ...
0
votes
1answer
34 views

Can't boot Windows 10 after installing Windows Server 2008

I installed windows server alongside Windows 10 and whenever I start my computer I don't have the option to boot Windows. When the computer starts it goes straight to windows server 2008 without ...
1
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2answers
18 views

User named 'daemon' has a process 'urlexceptiond' in OS X process list

What is this process called urlexceptiond in OS X (latest version)? The user is daemon and I wonder if it could be malware ?
0
votes
2answers
3k views

Installing multiple versions of a shared library

I am running ubuntu 10.04 and I want to use tmux 1.6. tmux has a dependency on libevent 2. My solution was to compile libevent2 and drop into /usr/local/lib then compile tmux against this lib and ...
4
votes
4answers
9k views

Redirect stdout while a process is running — What is that process sending to /dev/null

I've run a command and redirected it's output via > /dev/null Now that it's been running significantly longer than I expected I want to see what it's doing. Is there a way to re-redirect the ...
1
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0answers
33 views

How to make Windows Boot Manager default bootloader

I had Windows 7 OS already on my computer, and then I installed Linux Ubuntu 16.04 LTS, so now I have dual operating systems, but also now my default bootloader is this GRUB (purple crap) screen, is ...
0
votes
2answers
14k views

Upgrading RAM in Dell Optiplex 380 [closed]

I've Dell optiplex 380 machine and I've 32bit Windows 7 ultimate OS on it with DDR3 2*2GB RAM on it. I want to upgrade my machine to use 8GB RAM with 64bit windows 7 ultimate OS and want to install ...
2
votes
2answers
952 views

How do I print multiple images to one page on Chrome OS?

I cannot seem to figure out how to print multiple pictures per page using Chrome OS. Would appreciate any advice. I'm googling and searching for a Chrome OS app or extension now, but so far no luck. ...
0
votes
1answer
25 views

At is scheduling the job but not executing the commands under it

Please help me solve my issue on at command. I am giving the below command and it is not executing. # at now at> ls -l > txt.txt at> <EOT> job 1 at 2016-04-27 11:31 when I try to ...
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votes
1answer
25 views

why does asynchronous I/O require buffering?

I read in some introductory lecture notes on I/O and operating systems that "asynchronous systems require buffering". Why is it so please? Cheers
2
votes
1answer
29 views

Accidentally Formated /dev/sda1

I was messing around with some partitions on a PC that has both Windows 7 and Ubuntu 15.04 installed on it. In gparted, I distractedly formatted /dev/sda1 as fat32. Upon rebooting, I got the message ...
0
votes
3answers
74 views

Two CPUs as a single system

I don't know whether this is a foolish question or not. Is there a way to make two separate dual-core systems to run as a single quad-core system under a single operating system?
1
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2answers
752 views

View all login history on macbook pro OS 10.6.8

What command can I use in terminal to see login history? I think it's possible someone created a hidden account or booted the machine in safe mode.
9
votes
1answer
265 views

Why do x86 CPUs only use 2 out of 4 rings?

So either Linux or Windows based x86 systems only use ring 0 for kernel mode and ring 3 for user mode. Why do processors even distinguish four different rings if they all end up using just two of them ...
3
votes
1answer
62 views

Thread states linux vs windows

Linux has: ready, blocked, running, terminated. Windows has: Ready, Deferred ready, Standby, Running, Waiting, Terminated, Initialized. Why does Windows have so many states? What advantage does this ...
7
votes
1answer
3k views

Install Chromium OS, but not from a USB

How can I install Chromium OS on my PC? I do not mean in a virtual machine, but actually a dual boot. I know you can boot from a USB, but that is not what I'm looking for. I really want to install ...
8
votes
6answers
11k views

Windows OS on external hard drive

Is it possible to install Windows OS to plug and play storage devices such as external hard drives, HDD enclosures (with SATA hard drives), USB flashdrives and the likes? What OS's? And if it's ...
0
votes
0answers
15 views

System-supporting SSD

I own a laptop which has a 1TB HDD and a 25GB SSD to fasten the OS. If I'd wipe that HDD, would the SSD still be used for this purpose? Or how can I set it to behave this way? Is it set only for the ...
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votes
1answer
933 views

Task Bar is not working Windows 10

I am having problem with my Windows 10 Taskbar. I can't click on tray icons nor i can search in the search box. Even if i press window key from keyboard nothing pops up . I don't know why it's ...
1
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0answers
8 views

Booting IDE as master, no boot, no operatingsys (/w status need?)

Have been making use of this forum for years, now it's time to make my own, first question! Gheghe I have been braking my head on this one. Partitioning status (IDE must be booted in another PC) ...
0
votes
2answers
6k views

Installing drivers after the OS reinstallation?

First of all, does clean install of an OS delete the drivers installed on the hard disk? If so, will the new OS that is being installed contain drivers necessary for the hardware to perform properly? ...
-1
votes
1answer
32 views

Can I reinstall Windows 7 32-bit Installer in my 64 Bit laptop. Lost it's user account password [duplicate]

I forgot my password in my 64-bit laptop and I have a 32-bit installer. I have not tried it yet because I am not sure, I will run it in BIOS.
0
votes
0answers
9 views

Using ab command, 100 concurent process fails in Linux, How to solve this issue for Linux?

What i have done : I have used following ab command : ab -n 1000 -c 100 http://192.168.101.143:8558/num?num=5 Here, I am trying to generate 1000 http request , 100 concurrent process, port ...
0
votes
2answers
16 views

Reboot after installation necessary?

Some apps, mainly antivirus apps, drivers, other non-OS update stuff mostly demand a reboot after an installation or after an update ends. I'd like to know, why? If an app changes its data or system ...
1
vote
0answers
38 views

Is it possible to have a HDD with Windows 10 and a Linux fully encrypted with VeraCrypt?

So I'd like to set up a multiboot system on my 4TB hard drive with Windows 10 64bit and a Linux distribution such as Debian and fully encrypt it with VeraCrypt. Is this possible? And if so how?
8
votes
1answer
606 views

Can a Telnet server detect the client being used through the protocol?

While web browsers send, among other things, the User-Agent string, does the Telnet protocol have a similar method of determining anything about the client connecting to it? OS? Specific Telnet ...
0
votes
0answers
47 views

recovery disc 2 not detected, recovery not progressing from 51%

I made system recovery disc,using dell back up and recovery.It requires 2 disc. Now i want to recover,during recovery after completing 1st disc with 51%,computer asks to insert disc 2.I inserted it ...
0
votes
1answer
36 views

Operating system and hardware lifespan

In the last few days, I started questioning about operating system X hardware's lifespan, to direct it in some specific research. Do you think is possible that an operating system can increase or ...
7
votes
4answers
101k views

An operating system wasn't found

When I boot my computer, it boots fine. When I restart it though, I get the following error: An operating system wasn't found. Try disconnecting any drives that don't contain an operating system. ...
33
votes
6answers
33k views

Why can't a 64 bit OS run a 16 bit application?

Why is it that: a 32-bit OS, when installed on a 64-bit CPU, can run old 16-bit applications, but if you install a 64-bit OS it can't run those applications directly and need some sort of emulation ...
3
votes
1answer
35 views

How do Access Points determine the client's OS?

I noticed that my router (Asus RN-N12E_B1) shows the operating system next to the clients that are connected to it. How does it determine that? Via User Agent? What other methods does it have at ...
0
votes
1answer
44 views

Installing Windows7 on iMac which already has Windows

friend of mine has iMac with Windows XP, without OS X. And here's the thing, is it possible to install Windows 7 on it? Because boot camp is not working or at least is not working as intended. Thank ...
10
votes
5answers
7k views

RAMDISK OS? Installing Windows 10 on a ramdisk

Is it possible to put the entire operating system on a ram disk? If I have 16 GB of RAM and it is an Intel Xeon. I don't have an SSD and my hard drive is killing my boot time. So can I just allocate ...
0
votes
2answers
78 views

Windows 10 - High level OS folder, taken ownership but still can't modify

Right so I'm trying to delete an empty WindowsApps folder on Windows 10. I've tried taking ownship of the folder. However whenever I try to delete the folder it says I need permisson from myself. ...
0
votes
1answer
39 views

Damaged touchscreen, disabled in Device Manager, does it still generate interrupts?

A friend of mine has (had) a touchscreen laptop. While carrying it, they hit the screen and the glass cracked. The damage is hardly noticeable when looking at the monitor, but unfortunately it is also ...