Hot answers tagged

49

0xFFFFFFF0 is where an x86-compatible CPU starts executing instructions when it's powered on. That's a hardwired, unchangeable (without extra hardware) aspect of the CPU and different types of CPUs behave differently. Why the first BIOS instruction is located at the "top" of a 4 GB RAM? It's located at the "top" of 4 GB address space - and on ...


26

The command in Windows 8/8.1/10 for fixing MBR is "bootsect.exe". bootsect /nt60 drive_letter: /mbr this fixes boot record of partition mapped to "drive_letter:" and the MBR of the disk where the partition is placed. C:\Windows\system32>bootsect bootsect {/help|/nt60|/nt52} {SYS|ALL|<DriveLetter>:} [/force] [/mbr] Boot sector restoration tool ...


25

You can disable the scheduled tasks that starts CompatTelTunner.exe by looking in the Task Scheduler. Computer Management – System Tools – Task Schedule Library – Microsoft – Windows – Application Experience or Start - Run - taskschd.msc Name: Microsoft Compatibility Appraiser Location: \Microsoft\Windows\Application Experience Collects program telemetry ...


21

It isn't located at the top of RAM; it is located in ROM whose address is at the top of the memory address space, along with any memory on expansion cards, like Ethernet controllers. It is there so that it won't conflict with RAM, at least until you have 4 GB installed. Systems that have 4 GB or more of RAM can do two things to resolve the ...


17

Windows 8 has "Hybrid Shutdown" enabled by default. In this mode, Windows doesn't shut down after logging you out, but enters hibernation. (Except when rebooting.) Disabling hibernation forces Windows to revert to fully shutting down and booting up.


10

First, this has nothing to do with RAM, really. We're talking about address space here - even if you only have 16 MiB of memory, you still have the full 32 bits of address space on a 32-bit CPU. This already answers your first question, really - at the time this was designed, real world PCs had nowhere near the full 4 GiB of memory; they were more in the ...


10

The "active" flag in Windows is called the "boot" flag in Linux. It's the same flag. Windows and Linux use different terminology for the same bootable partition or drive The term "active" is used for the bootable partition when you are in a Windows/DOS-type environment. The term "boot" is used for the bootable partition when in a Linux ...


9

You could resolve the error by repeating the steps : Run the installer. Open a shell (ALT + F2). Create the directory cdrom directly on the root of the file system: mkdir /cdrom Note : If you got problems making the directory /cdrom, disable the CD-rom player in BIOS or disconnect the cable Mount the USB as if it is a CD-ROM: mount -t vfat /dev/...


9

While there is nothing limiting the computer from logically addressing all 264 addresses, the limitation happens due to the implementation of MBR-style partition headers. In the standard DOS-style MBR commonly implemented in most IBM-compatible computers, each 16-byte partition entry only has room for a 4-byte (32-bit) LBA sector address. Because this only ...


9

It doesn't make sense to dd a Windows ISO to a USB drive. It's simply not supposed to be bootable this way. For the PC to boot a USB drive, the drive needs to have either a MBR with proper boot code for hard disks, but not ISO9660/UDF, for BIOS/CSM, or a proper FAT-formatted ESP for UEFI. The simplest way to make a bootable Windows installation USB for UEFI,...


7

The BIOS is a 16-bit program running in real mode, and in this mode it is possible to address only 1MB. This is incorrect. 16-bit real mode does not limit the processor to 1MB of memory. While it's true that an x86 processor starts out in real mode, and defaults to the 16-bit 8086 instruction set, there are extensions in the 80286 instrution ...


6

The proper way to do this is sysprep or System Preparation. Here's what you need to do: C:\Windows\System32\sysprep\sysprep.exe /oobe /generalize /shutdown This: Enters the Out Of Box Experience state Generalizes the OS, removing PC specific HW IDs Shuts the PC down once finished


6

Short answer: it's "legitimate" disk usage by a MS tool, just like the MsMpEng (MS Malware Protection Engine) it's scanning your disk regularly. How do I get to that statement? Well, I have had the same behaviour on my Win 7 machines and did some digging. First, I used the Resource Monitor and found CompatTelRunner.exe reading what looked like all of my ...


6

You booted from the flashdrive to start the install process. From the perspective of the installer (which is a program running on a "live-in-the-sense-of-live-CD" version of Windows called Windows PE), the C: drive probably is the removable (flash) drive (the message even mentions that it's a removable drive). It is odd that it would still be called C: at ...


6

From 15 Windows 10 problems - and how to fix them : Like Windows 8 before it, Windows 10 uses a hybrid boot to enable fast boot times. When you shut the system down, apps and app processes are terminated, but the Windows kernel itself is hibernated to allow for a faster restart. In theory, it's great, but it seems to still be very slow for some ...


5

Here are some Q&A that might help you: Did you do a full shutdown? A hybrid shutdown (similar to hibernation) might prevent you from booting from the USB drive. To perform a full shutdown press Win+X and select the administrative command prompt. Type shutdown /s /t 0 and press Enter. Did you try to call the boot menu? There might be a keyboard ...


5

This is comon problem in all lenovo laptops. I also have faced this problem so many times. For solving this please goto link i provided (link of oficial lenovo support site) and download latest bios setup and install it it will updte your bios and all will be all right. download bios setfor window 8.1 and install it the manual also given in pdf format. http:/...


5

The basic order of operations that happens while a BIOS is trying to find something to boot is: Load first sector (512 bytes) of the device you're trying to boot from (HDD, SSD, Floppy Disk, Optical Disc, etc) into memory Check if the 511th and 512th bytes are 0x55 and 0xAA, respectively. If not, go back to step 1 and try the next device, or give up if ...


5

You probably had read an outdated text. Today's computers don't boot via MBR. More precisely, we're on a transition period, some of them use MBR, some don't. One cause is the fact MBR doesn't allow to paritition drive larger than 2 TiB. Yes, you have dd'ed a place where MBR is typically located, but there is no code there and the partition table contains ...


4

What happens between Power On and the CPU initializing? Hardware Power Sequences: The Pre-Pre-Boot When someone pushes the power button, the CPU can't simply jump up and start fetching code from flash memory. When external power is first applied, the hardware platform must carry out a number of tasks before the processor can be brought out of ...


4

The answer is yes, the new battery may have been faulty. It is also yes, the motherboard could be faulty.. We simply can't asnwer this question! The only way to know is for you to buy a brand new battery. Test it. You will then have your answer. Also, as BigChris mentions in the comments, the battery could easily have lost charge through self-dischage. ...


4

EDIT: The reason that the Windows 10 Boot manager doesn't work with f8, is because it has been disabled by Microsoft. to Re-enable it, follow these steps. (you will need a recovery DVD or partition available for your Windows 10 installation) Power on your PC. Use the appropriate key(s) to enter into the BIOS setup. Configure your PC’s BIOS to use your ...


4

I suspect (but am not certain) that the problem is caused by the fact that OS X likes to see gaps (of at least 128MiB) between most partitions. See Apple's TN2166 document for details, and particularly the "Partitioning Policy" section. I've seen OS X installations and updates fail when such gaps are absent, so this could be the same thing. If so, though, ...


4

Pretty much what @karel says. Its possible that the hard drive connector has just been dislodged (hopefully), however it is unfortunately likely that the drop has damaged the hard drive in the computer and will need to be replaced. Depending on your skill (and to a lesser extent the type of computer) it may be possible for you to open it up and reseat ...


4

Basically, the question boils down to: Why do we not design stuff so that the OS cannot be modified. (Using ROM chips or any other method is just an implementation details). The answer is sadly very simply: We do not make flawless software. This means that we either: Have an unchangeble OS with all the bugs in it which we made when the OS was made (and ...


4

"Disklabel" is a generic term for the block of information which describes the disk's structure (partitions and sometimes boot information). PCs usually use either the MBR (aka "MS-DOS") format disklabel, or the newer GPT one. (Older BSD systems also have their own disklabel format, which either replaces MBR or is nested inside it.) Earlier Mac computers ...


4

A "disklabel" defines the boundaries of sections of the hard drive. The MBR does this same thing. The GPT format does the same thing. They are different ways to do the same thing. Here's an analogy: it is like having a text file that says: Prefix=Mr. FirstName=George LastName=Washington and another file that says: [FamilyName:Washington] [FirstName:...


4

In addition to the other points mentioned, it may be helpful to understand what an address is. While newer architectures complicate things, historically a machine would on each memory cycle output the desired address on 20 to 32 wires (depending upon the architecture, with some special tricks to note whether it needed to a pair or foursome of bytes ...


4

You have ruled out direct hardware incompatibility by running 64-bit Linux successfully with the same configuration as your 64-bit Windows 10 install. According to this MSDN article (https://msdn.microsoft.com/en-us/library/ms854226.aspx), "it might be caused by a device driver, a system service, a virus scanner, or a backup tool." As such, I would suggest ...


4

If you want a GUI environment, use a Linux loaded flash drive and do a live boot up. From there, you have full control of all your data. The easiest Linux environment I'd recommend is Ubuntu, mainly because of the abundance of documentation available online. Steps: Download Ubuntu. Make a bootable Ubuntu flash drive (documentation has detailed steps). ...



Only top voted, non community-wiki answers of a minimum length are eligible