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87

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 ...


58

Both. CMOS stores BIOS configuration information. When you "enter setup", you are running the BIOS's configuration program, which loads the settings defined in CMOS. You are "setting up" the CMOS, by providing configuration information the BIOS will use as it runs. The BIOS is a program written as Firmware onto a ROM, so it cannot be written to (except by ...


33

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, ...


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 ...


12

My USB won't boot I am going to assume that this means an USB pen drive (and not a USB printer, USB scanner, USB network card....) This can have several reasons: The device is not bootable. The deivce is not bootable unless it was present early. The computer does not support booting from that type. The computer does not support booting from that ...


11

I finally found another post on another site with the exact problem and solution that fixed it for me. Apparently there's a separate brightness setting for the screen when it's plugged in vs when it's not. The issue was the 'plugged in' version of the brightness setting was all the way to the lowest (black). Safe mode must have worked because the boot ...


10

Your question is excellent and provides incredibly useful details, thanks! Here are my suggestions, in no particular order. A: What is that RollBack splash screen on startup? This could be a reason for slow startup times but personally even if it was absolute crap, I would still expect Win7 to load normally once "Rollback" was was finished. B: You have a ...


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 ...


10

This smells like the "Capacitor plague" You should look for swollen electrolytic capacitors. See this Wikipedia for an example view. If you are lucky you can change some of them and have a working board again for a few month. If not, buy a new one. This is most of the time cheaper than the labor you will need to figure out the exact defect.


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 ...


8

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

Definitely not the hard drive. It could be the screen or the graphics card, but it's more likely the graphics card given that the computer spontaneously rebooted. Easiest way to tell would be to hook up a different screen and see if you get the same results. If you do, then it's the video card. Your only option is to replace it.


7

Bootsect.bak is a backup of the primary Bootsect.dos. It is created by default by old Windows operating systems when any boot modifications occur. It can be safely deleted, as it is only a back-up unlinked to the actual boot sector. Tip: Bootsect.dos is used to boot into the non-Windows NT operating systems. Bootsect.dos is created for example by Windows NT ...


7

The article Windows Update KB3033929 Update Loop contains the only two known solutions for this update loop. Before starting, I suggest taking an image backup of the entire disk and verifying that you have the proper boot CD or USB required to restore it in case of catastrophe. I would suggest in the future to always take such an image backup before doing ...


6

You could go into the "Network and Sharing Center" and use the "Change adapter settings" option to disable the wireless adapter (right-click on the adapter and you should see "Disable" as the first option). If you don't want to disable the wireless adapter you can set the wireless service to start automatically, but with a delay. I don't have a laptop on ...


6

It looks like you are missing the Intel Chipset drivers. That could absolutely slow your computer down. Go install all those drivers from Asus: http://www.asus.com/Notebooks_Ultrabooks/K56CB/HelpDesk_Download/ *Please verify your laptop model before installing drivers. Next, I would try removing Rollback rx pc. Test it without it installed. If that program ...


6

Issue: AFTER successfully removing the 'RocketTab' malware (using a utility such as Malwarebytes Anti-malware), Windows starts up with a 'Command Prompt' (cmd.exe) appears and is shortly followed by an error message reading, "Windows cannot find c:\program files(x86)\rocket tab\client.exe". Resolution: Open the 'C:\windows\system32\tasks' directory. Locate ...


6

If your USB drive is FAT formated, the maxmimum Size for a single file is limited to 4GB. If you need to copy bigger files you have to format it in NTFS.


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 ...


6

In many modern CPUs, including Intel and AMD models, some instructions are executed directly in hardware, and some are "microcoded" - essentially, such instructions are internally made up of a series of smaller internal-to-the-CPU-only instructions. I'm not sure what you call the facility inside the CPU that "executes" microcode, and I believe microcode ...


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

Windows runs makecab.exe to reduce the size of the old CBS log file. You can find compressed CBS.cab files under C:\Windows\logs\CBS. Windows scans for updates at start, so it detects too large logs and compressed them. So, calm down, nothing is wrong.


5

Instead of booting with the normal image, I used the fallback version and managed to boot into the system. As it turns out, Linux could not detect any drives due to the block mkinitcpio hook (responsible for block devices) missing from the default image. This was due to it being placed after autodetect in /etc/mkinitcpio.conf. To fix this, the HOOKS=... line ...


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 ...


5

Most of early computers of the 1980's or about had kind of operating system (hardware drivers, IO support, program loading, very simple command line interface, etc) in the ROM chip. It could somewhat function even while RAM chips were inoperable. This feature was used in special ROM content versions designed for running hardware tests and communicate mostly ...


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

"I tried pressing F12 to select devices, but nothing happens." F12 does not seem to be the correct key ... Source BIOS Access Keys for Sony, Lenovo, Toshiba, Dell, Gateway, and More! Sony VAIO, PCG-Series, VGN-Series Press F1, F2 or F3 after turning on the computer.



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