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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How to stop and detect the fork bomb

#include <stdlib.h> #include <unistd.h> int main() { while(1) fork(); } This is the code for a fork bomb. In our college, we connect via telnet i.e client serving protocol. ...
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4answers
5k 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 ...
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5answers
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How to check whether my OS is 64-bit or 32-bit?

What is the best way to determine whether my OS is 64-bit or 32-bit ? Assume that, I directly on some os & I am going to install a software on it. But how to determine, whether OS is 32-bit or ...
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3answers
343 views

How does a computer know which CD/DVDs to boot from?

What actually happens when a user reboots his or her system with an OS disk (or other bootable disk) in the CD/DVD drive? For example, when I put in my OS installation CD and start the computer up, ...
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2answers
550 views

Running Homemade Operating System

Starting out with an operating system you wrote, how could you run it and test it on a computer? Would you have to delete the current operating system that is being used, or could you run one ...
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3answers
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How can I distinguish current operating system in my .vimrc?

I use Vim on both OS X and Windows, with almost identical configuration. I would like to be able to use the same .vimrc on the two operating systems, but there are a couple of things I need to ...
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6answers
583 views

How can I duplicate my Linux environment if I am migrating to different hardware?

I currently have packages, modules, settings, etc. for Eclipse, MySQL, Python, Firefox, etc. set up on Kubuntu. I have also optimally configured Kubuntu for my needs. I would like to duplicate my ...
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5answers
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Why do operating systems have file size limits?

What limits a file to have some maximum size depending on the Operating System? From this page: I do not exactly understand this. If you have the storage space, what else can be the limitation? ...
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Should I install my operating system on my SSD or HDD?

I'm currently deciding whether to install my Operating System on my SSD (solid state drive) or HD (hard drive). Will I be having programs on the HDD and the OS on the SSD or vice verca? Which will ...
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224 views

Swapfile on different drive

Is it worth to spend money on a small capacity HDD (~5-20 GB, very cheap though) to use it as swapping area for the OS? I do believe it will increase the OS performance , or maybe SSD (still ~5-20 ...
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5answers
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How to safely delete stuff from %SystemDrive%\Windows\Installer? [duplicate]

Possible Duplicate: Is it safe to delete from C:\Windows\Installer? Not Duplicate: The link mentioned above talks about Windows XP. I am talking about Windows 7. The behavior of the ...
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6answers
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Windows 7: Should I Install 64-bit or 32-bit Version? (x64 vs x86)

Deciding which Windows 7 version to install can be a difficult decision and can really limit what you can do with your system. Do you have any practical hints which could help decide which version to ...
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7answers
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How to install Ubuntu, Windows XP and Windows 7 from scratch as triple-boot system

I'm currently running Windows XP, but have ordered Windows 7. I want to keep Windows XP on a separate partition, and install Ubuntu as well. In which order should I install the OSs, and is there ...
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2answers
722 views

Partitioning a hard drive

Is there a way to split a hard drive into more than 4 primary partitions? I am installing multiple OSs, and it would make life a lot easier if there was a way to do this. My hard drive is 1TB.
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4answers
2k views

What happens when you install > 4GB of RAM in a computer with a 32-Bit OS?

So I'm a programmer and I'm not a complete idiot so I know exactly why you can't access memory where you can't have pointers. But I've never tried this and I don't think I ever will because it seems ...
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4answers
826 views

Is BIOS considered an OS? [closed]

This question comes to mind when dealing with RAID arrays, but is not necessarily applicable to the subject. How is that the BIOS is able read from a hard drive to effectively load the OS, when ...
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7answers
35k views

How can I determine the OS of a remote computer?

How can I determine the OS of a remote computer, given its computer name?
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3answers
2k views

Are drivers part of the operating systems?

I have difficulty in understanding what's included in an OS and what's not. Is a device driver such as a printer driver or graphic driver part of an OS? Thinking about the definition of an OS I ...
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2answers
2k views

How OS detects memory access violations

How does an operating system (preferably Linux) know that you've accessed a memory location that you're not allowed to? This question was inspired by those damn pointers! The way I see it is: ...
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4answers
1k views

What happens when a computer starts?

I'm trying to understand what happens when a computer is turned on. How the computer works on startup, various initializations that take place, etc. For example, is the bootstrap loader the first ...
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2answers
1k views

What does the term “OS rot” refer to?

I'm asking because I just saw a question about the "Best way to avoid OS Rot in Windows 7" and had never heard of the term "OS Rot" before. It's semi-comprehensible from context in that question, ...
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3answers
6k views

Installing AucTeX 1.86 over Emacs.app in OS X

I am trying to install AucTeX 1.86 over an Emacs binary (version 24.0.50) from emacsformacosx.com. On first attempt ./configure outputs: configure: error: Cannot find the texmf directory! ...
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4answers
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How to find my Windows OS is x64 or ia64?

Let me explain the scenario. While I scan many executables in my windows director with ProtectionID, I had to scan Windows Explorer. And the results or given below. Scanning -> ...
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4answers
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Do operating systems run faster on smaller hard disk partitions?

If I partition my hard disk, is my computer going to perform faster/better? In other words, the smaller the active partition is (the partition with the operating system), the faster the operating ...
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2answers
4k views

Prevent exe execution from temp internet folder

how can i prevent exe excution from temp and internet temp folder. we have antivirus deployed but it does not prevent exe execution from temp folder. I have tried prog trust-no-exe ...
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2answers
2k views

Running Operating System from memory

Assuming SSD's are extremely prone to faliure how economical would it be to load an OS into main memory and run it from there? I can think I can deal with a few obvious drawbacks (I've survived ...
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4answers
11k views

Can you re-install Windows 7 OEM on a new motherboard?

I want to buy a copy of Windows 7 OEM for my PC so I can run Adobe Premiere on a 64 bit OS. However, there seems to be a problem with OEM copies as some people say that once you install them you can't ...
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3answers
10k views

Does it make sense to put your operating system on a SD card?

A friend suggested putting the whole operating system on a SD card, arguing that access time delays where much shorter than a regular hard drive, which needs to spin up first. Wikipedia, however, ...
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2answers
282 views

How are page files stored on hard drives?

Just as RAM is divided into frames, the logical address space is divided into pages and the secondary storage into blocks of the same size. Pages are very small in size, 4 kB or so, and are swapped ...
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1answer
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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 ...
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4answers
2k views

Windows 8 PC added to trusted list but still thinks it's untrusted

I just upgraded both my PCs to Windows 8 x64 and I went through the process to add my PCs to the trusted list on Windows Live. Both computers appear on the list in my account settings online, but ...
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5answers
2k views

What is UNIX and what's UNIX-like?

Derived from this question: If opensolaris, freebsd, openbsd, netbsd are not UNIX, what is then? What confuses me more, is the fact OSX1.5+ is UNIX, while prior version of OSX weren't What is the ...
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What determines endianness

I was wondering if endianness only depends on CPU? Does it depends on other hardware, such as memory, secondary storage device? Does it depends on OS? Why in Wikipedia, does it seem to be true? ...
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4answers
985 views

What is technically wrong with fast OS switching?

An application (fast switcher) stays resident before the OS starts, and will be activated using a key combination (for example: Ctrl + Alt + Shift + Esc). After detecting the key combination, the ...
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2answers
820 views

What is the difference between Ubuntu, Xubuntu, and Lubuntu

I am relatively new to Linux operating systems and I'm trying to find out more about them. Unfortunately, I cant find a whole lot of good sources about them. Right now I get a bit confused and mixed ...
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6answers
1k views

Is file system part of operating system?

I was wondering if a file system on a storage device is part of OS? I don't think it is. Instead it is part of the storage device, and exists outside of any OS although was created by an OS. Is my ...
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4answers
196 views

What is the reasoning for hidden files in operating systems?

On every operating system I have used (Ubuntu, Fedora, Windows, and Mac OS X), there has been a standard for hidden files. Initially I thought that this feature was simply to hide some files from ...
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5answers
10k views

“This CPU is not compatible with 64-bit mode.” - Installing Windows 7 Ultimate 64-bit on a netbook with a 64-bit Intel Atom CPU

I tried installing Windows 7 Ultimate SP 1, 64-bit on a netbook (Lenovo IdeaPad S110), which has the Intel Atom N2800 (1.86 GHz) as its processor, but I get the following error message when the ...
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6answers
2k views

What does etc stand for/mean?

In most (all?) *nix systems there's a directory named /etc, what does etc stand for?
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1answer
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Is there a Firefox extension that prevents websites from detecting what operating system you're using?

Is there a Firefox extension that prevents websites from detecting what operating system you're using? Also, if there isn't a plugin, is it possible to write one? I know I can disable websites from ...
6
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2answers
313 views

Numbering in Windows 7 and Windows 8 [duplicate]

Possible Duplicate: Why is Windows 7 so called? I was wondering why Windows 7 and Windows 8 are numbered as such, if there are correspondences to "Windows 1, ..., 6"?
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2answers
166 views

Buttons on my Ubuntu Machine

All of my buttons on any kind of popup window don't seem to work that great with my mouse, I sometimes have to press enter on my keyboard after clicking, I hear that there is a fix for this out there ...
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4answers
4k views

Can I copy my operating-system on an USB-stick to use it in the go?

I'm tired of configuring my system and all applications for different computers (work, home, laptop, ...). Can I copy my system on an USB-stick and boot from it? What are the pitfalls in doing so and ...
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2answers
2k views

Installing Windows 8 pro on a built PC

I'm planning on building my own PC with the help of a friend, and after reading through this article, it seems that I need to purchase a System Builder licence. Does this mean that I should not buy ...
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4answers
589 views

Where can I download previous versions of Microsoft Operating Systems?

Like Windows ME, Windows 98, Windows NT and others. I want to test and compare operating systems for my satisfaction of learning new things.
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3answers
18k views

Is it the address bus size or the data bus size that determines “8-bit , 16-bit ,32-bit ,64-bit ” systems?

My simple understanding is as follows. Memory (RAM) is composed of bits, groups of 8 which form bytes, each of which can be addressed ,and hence byte addressable memory. Address Bus stores the ...
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3answers
5k views

Difference between shutdown ( power off ) and restart ( reboot )

What is Difference between shutdown (power off) and restart (reboot) ? What type of signals passing at time of reboot and poweroff, to where ? What is difference between these two signals ? At ...
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1answer
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Theoretically possible to run two operating systems simultaneously?

A friend of mine asked a question that got me thinking. Is it possible (theoretically, I assume it hasn't been done) to run two operating systems simultaneously on the same computer? Not in the sense ...
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3answers
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Kernel and User mode distinguishing

Who is responsible for determining that the process is in the Kernel mode or User mode? I know kernel knows which process is belong to what space, but how the CPU determines that? I mean should CPU be ...
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2answers
188 views

What does BeOS have to offer to todays users? [closed]

The operating system BeOS was in active development between 1995 and 2001. POSIX compatible while not being unix based it was optimized for working with digital media. Does this operating system ...