64-bit refers to processors that have a word length (the fundamental data type of registers and memory transfer operations) of 64 bits, allowing each word to hold 2^64 = 1.845 x 10^19 discrete values (over 4 billion times as much as a conventional 32-bit word).

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165
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19answers
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32-bit vs. 64-bit systems

What are the differences between 32-bit and 64-bit systems? If you have used both of them, what kind of sharp differences have you experienced? Would it be a problem to use 32-bit programs on ...
31
votes
8answers
19k views

Is there any benefit from installing Windows 7 64-bit when you have less than 4GB of RAM?

I've recently purchased Windows 7 Ultimate. I have an AMD Athlon64 X2 5000+ with 2GB DDR2 RAM. I know RAM has gotten much cheaper, I know, I know, but I am not going to be able to upgrade my RAM for ...
8
votes
6answers
12k views

How to enable 4GB in my Windows 7 64 bit?

I have the following machine configuration: Intel Core 2 Duo E6300 1 x 2048 MBytes memory chip 2 x 1024 MBytes memory chip 1 x Radeon HD 4870 Motherboard : Gigabyte 945P-S3 Windows 7 RTM 64-bit In ...
29
votes
5answers
28k views

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

Why is it that a 32 bit OS which is installed on a 64 bit CPU can run old DOS 16 bit applications, but if you install a 64 bit OS it can't run those applications directly and need some sort of ...
13
votes
8answers
107k views

Why is all my extra RAM marked as “hardware reserved” in Windows 7?

I have a new HP Z800 Workstation, running Windows 7 Enterprise 64 bit. Z800 Specs are here. The machine has 4GB of RAM -- windows reported 1.99GB available, 2GB was "hardware reserved". I added ...
15
votes
3answers
41k views

Can a 32 bit OS run in a 64 bit processor?

What's the difference between 32 bit OS and 64 bit OS? Can a 32 bit OS run in a 64 bit processor?
8
votes
3answers
16k views

8.00GB RAM (3.22GB usable) in Windows 7 x64

I have set up Windows 7 Ultimate 64-bit on my PC. I have 8GB RAM and my BIOS states the correct amount (8192MB), but Windows (System Manager) says I have 8.00GB (3.22GB usable). give me a solution. ...
4
votes
3answers
49k views

Unable to open IE 10 in 32-bit mode

I need to run IE 10 in 32-bit mode on 64-bit Windows 7 Enterprise N. When I run IE 10 from "C:\Program Files (x86)\Internet Explorer" I can see in task manager that I have only one process ...
10
votes
7answers
7k views

How to tell if a computer has a 64-bit CPU or OS

How you can check if your computer Has an x86 (32-bit) or x86-64 (64-bit) processor? Is running a 32 bit or 64 bit operating system?
5
votes
4answers
14k views

How do I get 16-bit programs to work on a 64-bit Windows? [duplicate]

Possible Duplicate: Why 64 bit OS can't run a 16 bit application? When trying to play an old game, Skyroads for instance, I get the following error message: The version of this file ...
77
votes
10answers
99k views

Quick way to tell if an installed application is 64-bit or 32-bit

I've got a third-party application (in this case Cognos Data Manager) installed on 64-bit Windows Server 2003. Is there a quick way to determine if an application has been built/compiled as a 64-bit ...
13
votes
2answers
3k views

Package managers for Windows [closed]

You might be familiar with Ninite. What I'd like to know is if there are good alternatives to that software for Windows. The features I expect: installs the latest version of software supports 64 ...
12
votes
5answers
119k views

How to check whether my hardware is 64-bit capable in Windows?

My OS is 32-bit but I want to know if my hardware support 64-bit
35
votes
7answers
8k views

Other benefits of 64-bit OS apart from memory expansion?

I'm trying to convince somebody of the benefits of switching to a 64-bit OS but I'm having a hard time finding arguments other than "you can use more than 3GB RAM". Are there any other ...
19
votes
4answers
2k views

Do I need to run defrag on an SSD? [duplicate]

Possible Duplicate: Do SSDs suffer from fragmentation? Is there an advantage to it? I mean, SSD is essentially random access memory.
6
votes
3answers
6k views

Windows Vista 32-bit to Windows 7 64-bit upgrade?

I have an old Vista box sitting around, and I'm thinking of upgrading it to Windows 7 64-bit, as it has 4gb of RAM. Well, I know that there's an "in-place" upgrade from Vista, but does it work from ...
9
votes
5answers
2k views

Can I install windows 7 x64 in a VPC where the host is vista x86?

Before I waste my time trying is this possible? If not, i'll just install win 7 x86 on the VPC.
3
votes
2answers
1k views

Install and run 32 bit on 64 bit machine

I want to make sure that on 64-bit Windows, 32-bit application can be installed/run without any issues? And it is guaranteed by Windows backward compatibility? For example, any application (e.g. ...
51
votes
8answers
153k views

Why Virtual Box won't give me option to create 64 bits guests?

My host is x64 bits Windows 8.1. I downloaded the latest Virtual Box (4.3) and I'm trying to create a VM with a 64 bits Ubuntu OS (ubuntu-12.04.3-desktop-amd64). When I go to New VM wizard, it ...
38
votes
10answers
3k views

Should I install 64-bit versions of operating systems?

With the release of Windows 7 coming up, 64-bit operating systems have caught my attention. What are the main advantages and disadvantages of installing 64-bit Windows 7? What type of compatibility ...
22
votes
6answers
13k views

Is it possible to run an old 16-bit DOS application under Windows 7 64-bit? [duplicate]

Possible Duplicate: Why 64 bit OS can't run a 16 bit application? How do I get 16-bit programs to work on a 64-bit Windows? Here at work my new development machine is Windows 7 64-bit ...
13
votes
6answers
4k views

What is the difference between 64-bit and 32-bit Operating systems? [duplicate]

Possible Duplicate: 32-bit vs. 64-bit systems I know that there are 2 types of OSs, 64 bit and 32 bit What is the main differences between them? And if I am buying a new laptop, which one ...
7
votes
2answers
1k views

Can't find the right Ubuntu Server ISO for VirtualBox

I have been trying all morning to find the right Ubuntu Server (12.04) ISO to use for installing an Ubuntu guest OS on my VBox VM. Here are the relevant stats: Host Machine: AMD 64-bit Host OS: ...
2
votes
2answers
19k views

Can 64-bit software run on 32-bit OS?

I have a 64-bit machine that has Windows 7 32-bit and Ubuntu 32-bit installed as a dual boot setup. Can I run 64-bit software on top of these 32-bit OSes, or are they a "bottleneck" limiting the true ...
11
votes
8answers
27k views

Detect Windows Server version 32/64-bit in CLI

What's the best and quickest way to detect whether you're running a 32 or 64-bit version of Windows Server from the command line? (Cygwin is installed)
16
votes
8answers
1k views

Should I choose 32 or 64 bit for Linux?

I own a Linux workstation which currently has 4 GB of RAM and planning to go for 8 GB in the near future. CPU is a Core2Quad Q9550. Should I install a 32 or 64 bit variant of Linux?
10
votes
6answers
18k views

Ubuntu 64-bit vs 32-bit

Is it worth installing the Ubuntu 9.10 64-bit version over the 32-bit x86 version? I will get the ability to address more than 4 GB of memory, but other than that, how does the 64-bit version fare in ...
8
votes
6answers
9k views

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 ...
5
votes
1answer
19k views

Can I install Windows 7 64 bit on VirtualBox running on a Windows 7 32 bit OS?

Is it possible to install Windows 7 64 bit on VirtualBox running on Windows 7 32 bit?
2
votes
5answers
433 views

Memory sticks, 32 and 64 Bit OS

My current setup: Windows Vista, 32 bit 2 sticks of 1 GB Kingston HyperX 1333Mhz ram Asus P5K3 Deluxe Motherboard My Theoretical, temporary setup Windows Vista, 32 bit 4 sticks of 2 GB, 1333 ...
140
votes
11answers
79k views

Why does 64-bit Windows need a separate “Program Files (x86)” folder?

I know that on a 64-bit version of Windows the "Program Files" folder is for 64-bit programs and the "Program Files (x86)" folder is for 32-bit programs, but why is this even necessary? By ...
9
votes
8answers
63k views

How do I install Windows 7 64-bit on a Mac using Bootcamp?

Has anyone been able to install Windows 7 x64 under Bootcamp on a Mac? I was able to get the 32-bit version to install, but I cannot get x64 to install. The Mac doesn't seem to even want to boot the ...
19
votes
2answers
150k views

Where do I download Java development binaries (JDK) for Windows 7 64-bit?

I am trying to install a Java development environment on Windows 7 64-bit, but I am unable to find a suitable install. Is there one available?
12
votes
9answers
7k views

Too much memory getting used

I have been feeling this way for a while, looking at task manager mentally ballparking how much physical memory should be in use, and noticing a large disparity. I finally got around to measuring it. ...
9
votes
1answer
275 views

Alternatives to Altaris/Symantec SVS

I use an old copy of Altaris SVS (link to lifehacker - Symantec gutted the old Altaris website) for testing applications - it lets me capture the changes one executable makes, or changes to a whole ...
8
votes
6answers
6k views

Why does my sytem only uses 3.2GB of my 4GM RAM?

I am using win 7 64 bit. I tried the solution given here, didn't help. David's answer makes me think this is futile. Is there anything else to try? Updates: Notice that I have a graphic card on ...
4
votes
3answers
28k views

Is it possible to use a 32-bit driver on 64-bit Windows 7?

I know it's not possible to install a 32-bit driver in the traditional way, but I really cannot find a 64-bit driver for my memory card reader. Is there anyway I can somehow use this device with a ...
9
votes
3answers
32k views

Can I upgrade from Windows 7 32-bit to Windows 7 64 bit without reinstalling all of my software? [duplicate]

Possible Duplicate: When reinstalling Windows 7, does the language, version, architecture (64-bit or 32-bit) or source (OEM, retail, or MSDN) matter? I'm getting a new PC soon and thinking ...
7
votes
3answers
9k views

Getting 'running low on memory errors' on Windows 7 64-bit with 8GB RAM

I have a new Dell laptop running Windows 7 64-bit with 8GB RAM. If I leave the system running overnight I start getting low memory errors the next day. Looking at Task Manager it shows 6.27GB used but ...
4
votes
4answers
5k views

Wake timers don't wake computer from sleep mode

I'm got a custom built PC running 64 bit Windows 7 Ultimate. So far everything works great except for one thing: it will not wake up from sleep mode for a wake timer or scheduled task. Sleep mode ...
3
votes
1answer
41k views

Run vcredist_x86.exe missing MSVCR120.dll

Ok, so I was getting an error trying to add a file to a game for full screen windowed mode, and it gave me the error "program cant start missing MSVCR120.dll is missing". Alright, no problem, so ...
2
votes
3answers
3k views

Tell the version of Windows XP (64-bits or 32-bits)

My laptop's CPU is the Intel P8600 (x86-64 architecture), and Dell pre-installed Windows XP SP3 on it. However I am not sure if the version of Windows XP is the 64-bit version or the 32-bit version; ...
7
votes
3answers
9k views

System32 and SysWOW64 on Windows 7

What is "SysWOW64" and how does it work? Are SysWOW64 and System32 both used/loaded into RAM during the Windows 7 boot?
5
votes
2answers
7k views

Can I legally downgrade from Win 7 64 bits to Win 7 32 bits? [duplicate]

Possible Duplicate: When reinstalling Windows 7, does the language, version, architecture (64-bit or 32-bit) or source (OEM, retail, or MSDN) matter? Tired of the unstable Win 7 64bit I got ...
2
votes
4answers
13k views

Connect to two LAN networks with a single card

I'm connected to a LAN with the aid of DHCP. Now and then, I need to reach a laptop someone brings to the office that's not configured to use DHCP. So far I need to do the following: Connect laptop ...
304
votes
18answers
126k views

If 32-bit machines can only handle numbers up to 2^32, why can I write 1000000000000 (trillion) without my machine crashing?

32 bit computers can only store signed integers up to 232 - 1. This is why we have run out of ipv4 addresses and have entered the 64 bit era. However, the number 232 - 1 (2,147,483,647) is not as ...
28
votes
5answers
97k views

How to reinstall GRUB2 EFI?

After successfully updating my bios, something went wrong and I ended up with a blinking cursor on the top left corner of a black screen. No errors, no nothing. The bios now only listed a SATA: ...
65
votes
9answers
216k views

Kill a process which says “Access denied”

I have a process that I can't kill with either Task Manager or Process Explorer - I get the error "Access denied". The process isn't a Windows executable. How can I kill it? Is there some tool I ...
16
votes
3answers
167k views

Where can I download a legitimate Windows 8 ISO image? [duplicate]

I bought a product key for Windows 8 a while ago, but I never got around to using it, because I can't seem to find a 64-bit Windows 8 ISO image anywhere. My processor is 64-bit, but my current ...
12
votes
8answers
2k views

Pros and cons of 64bit vs 32bit Windows

What are the advantages and disadvantages of the two types of system? I know that 64bit allows more RAM then the 3-and-a-bit used by 32bit, but what other differences would you expect to see? I am ...