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81

Does every OS need RAM?For IBM PC compatible hardware, a mandatory step of the BIOS POST process is to check if there is RAM to load the BIOS into. Optionally the POST process checks of your RAM functions correctly. After the POST process, the BIOS loads the bootloader to the RAM and gives control to the bootloader. So the answer to your question ("Does ...


32

It's possible in theory, but it would be very slow, since it'd need to use the disk for any temporary storage that didn't fit in the CPU caches. (CPUs have a few megabytes of cache because even RAM is too slow for them. Think about that.) So you'd need a rather small OS. But, another thing is, the BIOS runs before and outside any installed operating system, ...


21

Computers are state machines. The problem is that the initial condition the computer starts with (which is, literally, instant) is not very useful to you and me. (Even after the first electron moves). What's useful to you and me is many millions of steps further down that state machine. The easiest way for developers to describe that state is define it in ...


19

There are several potentially helpful answers here, but I think there are two important points that haven't been made: No, it is not possible to programmatically determine that Windows and all startup programs have finished booting. This is essentially the Halting Problem and no program out there will be able to answer the question "For this arbitrary ...


15

You could, with some effort, design a system that contained no RAM. Load your software from ROM (or storage) and do everything in registers or on cache. Such a system would have exceptionally narrow use and given today's RAM prices be a bit pointless. An off-the-shelf laptop will not function without some onboard memory. Your real question is more likely ...


15

As @Gaurav Joseph already wrote, the problem is caused by the BIOS battery. Some background: In order to access a disk you need the right drivers. In the past those drivers were loaded before you could start installing. Eventually the disk controllers and disks in most PC type computers standardised to something called IDE or ATA. Windows XP (and other ...


10

I want to install ubuntu on external SSD and use it as my primary OS and I want to keep my windows 8.1 on my primary HDD in computer for gaming and other stuff. Unplug your internal hard drive, plug the external ssd in, and install Ubuntu to it. In your UEFI change the boot order to boot from removable devices before hard drives. Now when the external ...


10

Reference Windows 7 Boot Error: ‘some file’ is compressed. Press CTRL+ALT+DEL to restart After switching on your computer or after restarting Windows 7 you receive the error ‘filename’ is compressed. Press CTRL+ALT+DEL to restart on a black screen with white writing when trying to boot into Windows. The ‘filename’ is different on different ...


9

If I read the question correctly everybody here is barking up the wrong tree. He states explicitly "in order to get to the BIOS". If the laptop is so broken it won't even get into BIOS, everything else is pointless. You can't boot ANY OS on this regardless of the RAM situation.


9

Something that comes close to what you're asking: Enable hibernation in power management and instead of shutting down your PC, use the hibernate option. This does turn off your PC's power and restores your PC to the state you were in when you turned the system off. Other than that, there's no built-in functionality that does what you are asking. The Windows ...


9

Solved :) The cause seems to be a strange feature in the UEFI implementation, which can also be seen in the Open Source TianoCore implementation: https://github.com/tianocore/edk2/blob/master/IntelFrameworkModulePkg/Library/GenericBdsLib/BdsMisc.c#L1425 I ultimately found it after diffing my EFI variable dumps after the last 21MB "loss" and finding ...


9

Why not using Windows Task Scheduler and the Event ID 100 to play a custom sound when Windows is really finished? Under Triggers select "On an event" and Log: LogMicrosoft-Windows-Diagnostics-Performance/Operational Source: Diagnostic-Performance Event ID: 100 Under Actions select "Start a program" with Program/script: "%ProgramFiles(x86)%\Windows ...


8

I have a free program installed that I have used for a long time, Soluto: https://www.soluto.com/ I am just a user, not connected. It works for me. It does a count down and allows you to select just what you want to load on boot. It also allows you to delay starts.


8

Just because Windows can limp its way into safe mode doesn't mean it's "intact", just that it's not completely hosed. Your MBR, boot sector and file system structures are probably fine, but you've deleted some files that Windows needs during a normal (not safe mode) startup. To fix the problem, I'd recommend refreshing your Windows 8 installation. This ...


8

I do the opposite generally, that is my home system is a Windows 7 machine and I run various flavors of Linux as VM's. Being as Linux can function quite nicely with limited resources, this works for me even though I only have 4GB's of RAM (mind you this does mean I run a single VM at a time and typically give it 1024MB of RAM at the most to keep plenty for ...


7

Your assumption that the memory is bad is likely invalid. If you get no beeps or on-screen messages, The root cause is almost certainly a failed CPU (somewhat unlikely) or a failed mainboard (very likely). Mainboards fail with age all the time due to cold solder joints, which were a common occurrence in the early days of the ROHS movement and the requirement ...


7

First, lets introduce the memory types. Once we understand them, we can understand booting process more easily. DRAM (Dynamic Random Access Memory) DRAM is a volatile (means the contents are gone when the power is off) memory type which stores data for CPU usage. Every data to be used, program to be ran should fetched from it's source to RAM first. In case ...


6

When you start a remote desktop connection (assuming you're using the windows remote desktop tool) you'll be able to expand the screen. From there you're able to save the connection settings (including credentials etc), save this .rdp file on the desktop. Next drag the file into start>programs>startup. Done!


6

No, your MBR is not working, but that's fine, because your Windows never used it in the first place. Your computer has the new UEFI firmware instead of BIOS, and it does not look for boot code in the MBR anymore – instead, it looks for the bootloader file in an "EFI system partition", and the firmware keeps a list of installed operating systems with ...


5

Or how abou this. You're interested in .net/C#, so why not just use Mono on linux? Its very cross platform in the sense java is.


5

The beeps are commonly referred to as beep codes. They provide an indication, usually about state of some hardware. A beep code is the audio signal given out by a computer to announce the result of a short diagnostic testing sequence the computer performs when first powering up (called the Power-On-Self-Test or POST ). The POST is a small program ...


5

The major advantages that UEFI provides are: 1. Better disk support: UEFI supports GPT (GUID Partitioned Table), which adds support for very large hard drives (e.g. those in excess of 2TB.). BIOS uses MBR, which had a size limitation of 2TB because of 32bit tables. UEFI has 64bit tables allowing the boot devices to be larger than 2TB. This has a lot of ...


5

Others have covered the rest of your question, but I see they have left this part unaddressed: But if I boot into Linux, I can boot the Windows partition as a virtual machine. Is this possible? And/or: If I boot into Windows, I can boot the Linux partition as a virtual machine. Is this possible? The short answer is yes. The long answer is yes, but ...


5

To get the ASUS X55U to boot first from the DVD drive do the following: Press “ESC” or “F2” to enter the BIOS setup Under the “Boot” tab, enable “Launch CSM” Under the “Security” tab, disable “Secure Boot Control” Save the changes and exit Press “ESC” or “F2” to enter the BIOS setup again Under the “Boot” tab, the DVD drive and available flash drives will ...


5

Windows will treat boot finished if it was 80% idle (excluding low-priority CPU and disk activity) for 10s after reaching the Desktop UI. To see the exact boot time use xbootmgr to trace why Windows boot slowly.


5

From verboon When enabling the startup options, Windows updates the file BOOTNXT and creates a new file BOOTTGT. When disabling the startup options, Windows again updates the file BOOTNXT and deletes the file BOOTTGT


5

Reformatting and reinstalling Windows does make your well used machine faster. However, thats an oversimplification. When you reformat, you blow away all those programs you installed, services, fonts, etc, etc. Lots of programs install startup programs and services and whatnots that get loaded at boot, which in turn slows the computer boot time down. ...


5

As I wrote in my answer to that question the received folk wisdom on the subject — as unfortunately exemplified by other answers there (and elsehere in SuperUser) — is stuck in the world as it was around 1991, despite the wealth of technical references available explaining how it is now otherwise. You wouldn't have been this confused if you ...


5

"second-stage bootloader" … "loaded drivers" … "GPU" … You're thinking that booting DOS+Windows was a (comparatively) simple affair, akin to how operating systems like Windows NT, FreeBSD, and Linux distributions boot. It was far from simple. The animation is an old and simple personal computing trick: palette rotation. There's no ...


5

Windows PE, Windows To Go, and Windows Embedded can be setup to boot from USB drives via a special pre-included driver. Other editions of Windows DO NOT support booting from usb. Long story short you cannot boot your copy of Windows, because it doesn't have the required driver, the driver it uses intentionally makes booting from USB not work. My suggestion ...



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