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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7answers
878 views

Performance loss of a 32bit OS on a 64bit processor

I recently reinstalled my notebook, and my friend laughed at me because I didn't install the 64bit-version of vista instead of the 32bit one. After which I wondered whether there was a great ...
3
votes
2answers
76 views

VPC Image to Boot Natively

I have a VPC that I would like to host natively. Are there conversion tools available to convert an existing VPC image to something I can boot to?
3
votes
1answer
66 views

What does gate mean in the Multics operating system?

I read Multics operating system. In the segment descriptor word (book) there is one part for number of gates for the segment. What does gate mean? I know the process can enter a higher-privileged ring ...
3
votes
1answer
294 views

What does an ACPI BIOS configure during boot?

When a PC boots with an ACPI BIOS, what does it exactly do? I understand that the point of ACPI is to allow the OS to control hardware resources and power management but before the OS is loaded ...
3
votes
3answers
174 views

Can anyone explain what is virtual memory?

In my system I am getting an error like "virtual memory is full". Can anyone explain to me what "virtual memory" is and how to fix that issue?
3
votes
2answers
64 views

Creating a system deployment disk [duplicate]

Hi guys i want to create an image of a windows 7 system and use it as a deployment tool and when I want to setup up like more than 10 laptops, then i just connect them on a network and deploy the ...
3
votes
1answer
700 views

How to disable the Mac OS X Dashboard?

I'm using Mac OS 10.6.7 on a low memory MacBook, so I would like to kill the Dashboard and not have it running at login. Tried this defaults write com.apple.dashboard mcx-disabled -boolean YES ...
3
votes
3answers
1k views

Which hard drive should one install the OS on for the best program run time performance? (SSD or SATA) Does it matter?

I have just build a new computer and I acquired a SSD(64gb) for faster read/write performance. I also have a much larger SATA drive. I was wondering if putting the operating system on one or the other ...
3
votes
2answers
1k views

MacBook and multiple OS's

I just got a new MacBook yesterday. I am not a stranger to Apple or virtualization or anything. I am looking for the best advice to run OS X, Windows and Linux and share a common data partition ...
3
votes
2answers
55 views

Load an remote Operating System to the local machine to work like local operating system

Could anyone of you suggest some method(idea) for loading an OS from a remote server to the local machine hard disk. Please see the scenario here, for more clarification. Imagine one guy has his own ...
3
votes
2answers
14k views

Is it Possible to Increase Display Resolution for OS X Maverick

The new OS X Maverick operating system has reduced maximum display resolution from 1920 x 1200 in Mountain Lion to 1680 x 1050, which is a SIZABLE reduction. The difference is obvious when viewing ...
3
votes
2answers
1k views

How to improve ram and hard drive performance

I'm not able to figure out what the actual problem with my system is. It takes 15-20 min to start up completely and when I checked the start up programs there was no big program listed. When I open ...
3
votes
1answer
1k views

Distributed vs clustered vs networked file system

What is the differrence between a distributed file system, clustered file system and a network file system ?
3
votes
1answer
4k views

How do preferred and alternate or multiple DNS servers work?

I was considering adding 8.8.8.8 to the end of my adapter's list of DNS servers as a backup in case everything fails, when it occurred to me that I don't really know how secondary and tertiary DNS ...
3
votes
1answer
3k views

How do hardware interrupts work compared to software interrupts?

To give you an impression of the level of detail I'm interested, one example. I know a system call ultimately leads to a trap which lets the processor store registers, switch to supervisor mode and ...
3
votes
2answers
119 views

Will this new drive make a significant faster speed? [duplicate]

Possible Duplicate: Should I put my operating system on my fast drive or my slow drive? I just check the spec of my new drive and old drive, currently I am using the old drive as OS, here ...
3
votes
3answers
537 views

can I have a virtual memory smaller than physical memory like for example 2GB of virtual memory and 4GB of Physical Memory(not with respect to usage)?

Like I have virtual Memory size = 2 GB ,Physical Memory Size=4 GB.......... Is this case possible? Please Explain
3
votes
2answers
859 views

Windows Recovery Console - forgot password

I upgraded to Windows XP SP3, which immediately "broke" the laptop - it never booted with SP3 on it. I put in the Windows XP install disk I had originally used to set up the laptop, and it ran for a ...
3
votes
1answer
40 views

introductory video on Ubuntu

Is there a great first video for someone that has no idea about operating systems to introduce them to the possibility of using Ubuntu, demonstrating what it looks like, advantages / disadvantages, ...
3
votes
3answers
7k 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. ...
3
votes
1answer
8k views

how to fix empty turn windows features on or off

I am running win 7 home premium, and now I see my windows and features list is always empty, i tried many solutions but nothing did it. I tried this last thing but failed to solve as well
3
votes
1answer
69 views

Why do computers crash much less often than ten years ago? [closed]

Back then my computers had kernel panics and blue screens at least once a month. Which parts of the hardware and of the operating systems have been improved the most since then?
3
votes
1answer
2k views

Windows 8 black screen after waking from sleep

Detailed The problem, when I trying to "awake" PC from sleep or hibernate (which running OS Windows 8 X64 Pro) getting black screen (Actually sometimes it awakes normally. But I can't figure out ...
3
votes
1answer
336 views

Using an OEM Windows XP license in a Virtual Machine

I just bought a Dell 640m laptop with Windows Developer Preview installed. There is no directory with any backups. The COA on the machine is for XP. I would like to install XP as a VM on the same ...
3
votes
2answers
2k views

Why is windows more prone to viruses than linux? [duplicate]

Possible Duplicate: How is Linux not prone to viruses, malware and those kinds of things? I want to get some broad level sense of why Windows is more prone to viruses than Linux.. What ...
3
votes
2answers
111 views

Understanding an Application based on the OS interaction with a Hypervisor

Following I will ask a few specific questions but I will set the stage first. My goal is to monitor Applications in a very odd place - between the OS and a Hypervisor. If you have comments about this ...
3
votes
3answers
1k views

What's a good OS to put on an old laptop with 1.2Ghz Celeron and 256mb of RAM? [duplicate]

Possible Duplicate: What is the lightest-weight Linux distribution? I just thought I would see what people thought. I can put XP SP3 on it, and it will run ok - but if there's a linux ...
3
votes
1answer
91 views

Spec for spec speed differences between specific and generic hardware setups

John Carmack tweeted: For the same given paper spec, a console will deliver twice the perf of a PC, and a PC will deliver twice the perf of a mobile part. Normally this is the sort of claim I ...
3
votes
0answers
58 views

What happens in a ARM based system before the OS is loaded?

What happens in a ARM based system before the OS is loaded and do they have BIOS, drivers, MBR or a different approach instead of these?
3
votes
2answers
3k views

What is Paging in memory management?

I was just reading Operating System Principles by Silberschatz et al when I came across paging in memory management.I'm slightly confused about it. It states that Physical Memory(I assume it's RAM) is ...
3
votes
2answers
845 views

unable to install windows 7 in my laptop with no os

I have a the following message when i try to install windows 7 through an bootable USB.. setup was unable to create a new system partition or locate an existing system partition I will explain ...
3
votes
1answer
99 views

Turn User Agent into Device Information

I have a list of user agents which visited my website. And I would like to turn them into user statics such as which browser and os are reaching the most to my website. For Example: I have one user ...
2
votes
4answers
115 views

I want to compile an OS. What is the best way to start?

Just to learn, I want to recompile some OS. I don't want a list of steps to be taken to do it because with that I will not be learning a lot, which would defeat the purpose. I also do not want to be ...
2
votes
7answers
497 views

Old Laptop, New OS

I have always been a Windows user. I have a laptop that originally had Windows XP on it and it is currently unused. I want to install a different OS on it. What OS can I try, and from where do I ...
2
votes
7answers
195 views

Is it a good idea to install an OS as soon as it's released? [closed]

Or is it better to wait some time so critical fixes are released? I'm thinking specifically about Windows 7, but this can apply to any OS.
2
votes
3answers
4k 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 ...
2
votes
3answers
1k views

Why does 32-bit Windows impose a 2 GB process address space limit, but 64-bit Windows impose a 4GB limit?

I get that 2^32 = 4,294,967,296 and 2GB is for the OS and 2GB is for the process, but why does a 64 bit OS only give 4GB of address space? Should it not be 2^64 = 18,446,744,073,709,551,615 which when ...
2
votes
4answers
6k views

How to store an XML document in Mac OS X?

Firstly, I opened TextEdit. Went to Format Menu & I set option -> Make Plain Text, I entered following Data, Which is to be required in my Application. <?xml version="1.0" ...
2
votes
6answers
933 views

Confused between 32 bit OS and 64 bit OS

I have 32 bit Windows Xp on my machine now i want to install Windows 7 64 bit. Can i install it? My machine is 3-4 years old. Does the bits of OS has anything to do with hardware? Or it's just a ...
2
votes
1answer
232 views

Named ports in Windows

I wonder how stuff like this works in windows (xp and other that have telnet): Start-> Run -> cmd -> telnet <xyz.com> http Start-> Run -> cmd -> telnet <xyz.com> pop3 ...
2
votes
3answers
11k views

Windows Kernel Name\Version?

Mac OS X has the Darwin 10.6.0 Kernel, and Ubuntu has the Linux 2.6 Kernel, so in Windows what is it called?
2
votes
5answers
899 views

What parts of the OS are the most important?

I've got an assignment to complete where I compare two operating systems of equal vintage, however my instructor hasn't really given me much of a scope for this? He has basically asked for 2000-2500 ...
2
votes
5answers
166 views

Favorite Linux Variety and why? [closed]

Right now I have Fedora dual booted with Windows 7. The reasoning behind that is just because windows was the first OS I ever used and has some essential software, and Fedora is the first linux ...
2
votes
2answers
412 views

Is my OS installed onto my SSD?

I ordered a new laptop that came with a 500 GB HDD, so I added a 128 GB SSD. I kind of assumed they would install the OS onto the SSD since in my experience that has been the norm. I'm pretty sure ...
2
votes
2answers
120 views

Can I find out which operating system created a file? [closed]

I have some files. All of them were created in different operating systems. Is there any way to identify from which OS each file was generated?
2
votes
3answers
26k views

What is the exact command to restart a Redhat linux system?

I am new in linux. I want to know the exact command to restart a red hat linux server 6.3. and it has to start network drivers etc. I am using VPN to connect to remote machine using VNC. Can anyone ...
2
votes
5answers
575 views

Why do modern pre-emptive multitasking OSs hang when the CPU is loaded?

This is an open-ended question, with many possible answers, but perhaps there's one big thing I'm overlooking. If not, perhaps this question should be community wiki. I don't use other OSs often ...
2
votes
2answers
390 views

Bits of CPU, architecture and OS

I was wondering if the bits of OS, of instruction set, of CPU registers, of data bus from CPU to memory, and of address bus from CPU to memory must be consistent in some sense and how? When we cay ...
2
votes
3answers
212 views

operating system that will run on a flash drive?

Do you know of anything like mojopac that will emulate your operating system? Ive already tried mojopac but no luck because the free version of the software does not allow it to run without running a ...
2
votes
2answers
357 views

timing a program

I am runnning a program in a linux server as well as timing its time usage by command time. Looking at the final output, I am confused since I thought "real=sys+user" or it at least approximately ...