Operating System Load
Operating System Load
Another things is that what is actually happen when the BIOS is okay and between the BIOS okay and you start see the windows running?This is call Operating System Load where after the POST is successfully completed the CPU searches Storage devices for special files that indicate the beginning of the OS and then loads it into memory.
The sequence in which the storage devices are searched is part of the configuration set-up stored in BIOS.Once the Operating System (OS) is located, the CPU copies what’s called the 'boot record' from the OS into DRAM.Control is then passed to the 'boot record' in DRAM, which then continues loading the rest of the OS.This process continues until the OS load is completed.When the OS load is completed the Desktop appears in the display monitor for you to enjoy!
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What happens when your PC on? IV
Back to the BIOS thing again.It can also have problem itself.What is it?
One common problem you can check for is to make sure that all the devices that are supposed to be attached to the IDE controllers are listed. If not—for example, if you just upgraded your hard drive or added a DVD-ROM drive and you don’t see a reference to them right after your computer turns on—then more than likely there is a connection problem between the IDE controllers on your motherboard and the device itself.
The way to solve it by open up your PC, check the cable connections at both the drive and on the motherboard and, if necessary, replace your IDE cable(s).
One more thing is if you have a SCSI controller installed in your PC, you will also see a message about any BIOS (separate from the main system BIOS) that it has, as well as a listing of all the internal and external SCSI devices attached to it.
So,next what is happen is when the BIOS finishes it work, it hands control of the start up process to some specific files stored in the first sector of your hard drive.
This special area is called the master boot record and it contains critical information about how to start Windows (or any other operating system(s) you may have installed on your PC) as well as the specific files needed to continue the start up process.
Okay let see after all thing have been done and if you’re not having any problems up to this point, and your computer continues to boot, then that means your booting process is fine and what a relief !
Labels: how
What happens when your PC on? III
Is there any POST Problems arise?
First you have to hear that did your computer beep at you when you tried to start it?
As we all know "Power On Self Test" (or POST) check everything from the motherboard to the keyboard. Only after POST is passed does the computer try to start up the operating system. When the POST is successfully completed, the computer beeps once.
If the computer beeps more than once, or if it doesn't beep at all, it means it failed the POST and never even got to the operating system. That indicates a problem with the hardware, or occasionally the BIOS, a small program burned into a read only memory chip (ROM) that controls the most fundamental interaction with the hardware. The BIOS is the program that runs the POST, among other things. If the computer has started successfully before, it's a good bet that your problem is in the hardware.
If the computer beeps more than once it's trying to tell you what's wrong. Each BIOS vendor (such as AMI and VIA) has their own "Beep Codes", but here are some common examples of what the codes mean. For example a long, continuous beep usually means a stuck key on the keyboard or a problem with the system's motherboard.
How to solve it?
Try to check your computer's manual or look on the BIOS company's web site for a chart of what the beeps mean.
Labels: how
What happens when your PC on? II
Another way to see what is actually happen when your pc is powered on is in these 10 ways.Well this is actually more step by step to understand how is the pc is running on until we as user can use it basically.
The step by step to explain it is normally called as (POST):
Power-On Self Test (POST) is a series of tests to make certain that necessary is present and properly operating.
1. First the Central Processing Unit (CPU) is reset.
2. The CPU checks itself and the POST program stored in the BIOS memory.
3. Then the CPU begins using the code located in BIOS to check components in the PC.
4. The DRAM is tested by writing and reading back every byte to insure proper operation.
5. The Keyboard is checked for attachment and to see if any key has been pressed.
6. Pushing certain keys during boot up tells the CPU you want to modify the BIOS code.
7. The Floppy and Hard Drives are checked to make sure they are present.
8. The Mouse is also checked to make sure it is attached.
9. Finally, the test results are compared to the configuration data in the BIOS.
10. Any mismatches causes the POST to fail and an error message appears on the display.
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What happens when your PC on?
When your computer is first turned on, it automatically loads a program called the BIOS, or Basic Input/Output System, which is stored on a special chip on your computer’s motherboard.
What is BIOS actually?
BIOS is essentially a combination of software and hardware in that it consists of software, but the contents of that software is stored in a hardware chip. On most recent computers, the BIOS can be updated via a process called flash updating, which uses a piece of software that’s stored on a special start up floppy disk to overwrite the contents of the chip with a new version.
As the BIOS runs, it performs a number of tests on your hardware called POST (Power On Self Test), such as checking the memory. Then it lists any devices that it finds attached to your computer’s internal IDE controller(s). Typically, this is any internal hard drives, CD/DVD-ROM drives, tape drives, etc.
Continued....
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Recover Deleted Files
Recover Deleted Files and Lost Data
These are among the utilities to recover deleted files or lost data.Mind that is all free license.Try to search on the net and download.
- PC Inspector File Recovery-Recover files that have been deleted, formatted over, or lost due to repartitioning.
- Restoration-Recover deleted files--or delete them for good--with this small program.
- VirtualLab Data Recovery Software-Recover data lost from almost anything short of a sledgehammer accident.
- WhoLockMe Explorer Extension-Delete tenacious files that you can't otherwise eliminate.
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Low level format utilities
Low level format utilities for the hard disk.
Important drive information (servo, sector layout, and defect management, etc.) is stored in the low-level format at the factory.
This information is designed to last the life of the drive and therefore it is not possible to low level the drive outside the factory. Although some drive manufactures and BIOS provided so-called "low level format utilities", they actually perform a write-read verify of the drive’s user data sectors, and do not actually perform a low-level format. In the event of a corrupted master boot record or boot block virus, use FDISK /MBR command to restore the master boot record. If you need to low level format your hard drive then check the drive manufacturer and download such an utility from its website. Every drive manufacturer provides just such a utility. Below is a list of hard drive manufacturers with a links to low level format utilities.
It is also a good idea when you hard disk becomes inaccessible to see if it is just the system files that are corrupted. Most of the time, it is the case. SYS will do the job of replacing system files. Therefore, low level format is always of LAST RESORT when you encounter HDD problems.
IBM(Hitachi) http://www.hgst.com/hdd/support/download.htm Seagate http://www.seagate.com/support/disc/utils.html Maxtor http://www.maxtor.com/en/support/downloads/index.htm Fujitsu http://www.fel.fujitsu.com/home/drivers.asp?L=en&CID=1 Samsung http://www.samsung.com/Products/HardDiskDrive/utilities/index.htm FAQ: Low level format Western Digital http://support.wdc.com/download/index.aspLabels: hot tips
Hard Disk Space Shrinking
Vista Hard Disk Space Shrinking and Reducing Anomaly
Windows Vista is running normally and properly, no blue screen, no error, no problem and it seems that everything is fine. However, the free disk space that is available kept reducing and shrinking to less and less amount. The free space can decreases by up to a few GBs a day, even if you do not download any big files, receive any big attachments or engage in file sharing or file transfer activity with your peers.
Worse still, even if you delete a lot of large files away, or run Disk Cleanup to clean and free up a lot of downloaded program files, temporary Internet files, offline webpages, hibernation file, junks in Recycle Bin, setup log files, system error memory dump or minidump files, temporary files, thumbnails and archived or queued Windows Error Reporting files, the problem won’t go away. The space is still anomaly and abnormally low, and getting lower, and it seems like it’s going to running out of space. And, if you manually add up the size of each folders taken up on the disk drive, the total free space appears far lower than the supposedly value.
This symptom is probably caused by the usage of disk space by System Restore and Previous Versions (collectively called Volume Shadow Copy). Sometime, Windows Vista mistakenly marked the maximum space limit that can be used by Shadow Copies to be Unbounded (no limit), and that’s where all the disk space program comes in.
VSS Unbounded Limit
For immediate relief from space constraint, you can reclaim and release all System Restore and Shadow Copies used disk space. For permanent solution, it’s best to set the limit for Shadow Copies space usage, or you can turn off System Restore (and Shadow Copies and hence Previous Versions) all together.
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RAM problem?
Here are some tips if you have some problem with your RAM :
- If you powered on your PC and it did not turn on, please turn your computer off.
- Check the simple things first, make sure your computer is properly connected to a power source. You'd be surprised how many times people forget to plug their computer back in!
- Make sure the RAM is set all the way down in its slot. The retaining clips on either side should be all the way up. Also, make sure your RAM is installed in the lowest numbered slot or in the slot closest to you current RAM.
- If trying the above fails, contact the manufacturer of the RAM.
Labels: hot tips