How to Resolve Unknown Operating System Error in Windows

Windows Vista boot sequence first involves loading the MBR, followed by the drive boot sector . The boot sector then accesses the Windows Boot Manager to finally load the Boot Configuration Data (BCD) store and complete loading the operating system. If any of these components get corrupt, the Windows fails to start. As a result, your data becomes inaccessible. The first tip to solve such problems is to run 'Startup Repair' If this fails, you should repair them manually or reinstall Windows as the last resort. At this point, if a valid backup is unavailable, a Partition Recovery Software can get your data back.

For example, suppose you use a Windows Vista based computer. You receive a blue screen error message when attempting to start the computer. The error indicates that a critical boot data structure (MBR, boot sector or Boot Configuration Data store) is corrupt. When you try to boot the computer from Vista installation disc and use 'Startup Repair' option under 'System Recovery Options' from Windows RE (Recovery Environment) as the basic troubleshooting step, you get an error message as below:

“Operating system: Unknown on (Unknown) Local Disk”

The data stored on the hard drive is inaccessible.

Cause

The 'System Recovery Options' cannot repair the disk. The error occurs when this fails to locate the operating system automatically.

Solution

Since the 'Startup Repair' has failed, you need to repair the corrupted boot components manually. To do so, you should use Bootrec.exe tool of Windows RE. You should first examine the primary boot time error message and error details after running 'Startup Repair' to know the exact component causing the problem. After this, you can apply these steps:

Boot your computer using Windows Vista installation disc and choose 'Repair your computer' option

Open the command prompt under 'System Recovery Options' after selecting the target operating system

Type 'Bootrec.exe' and use any of the following options on the basis of affected component:

/FixMbr
/FixBoot
/RebuildBcd

If the above measures do not solve the existing issue, you can reinstall Windows provided a complete backup is available. If not, you are recommended to use a Partition Recovery utility to recover the lost data.. A Partition Recovery Software can extract lost and missing data using high-end scanning algorithms, while providing a self-explanatory interface.

Stellar Phoenix Windows Data Recovery is a reliable and powerful data recovery product that recovers lost partition, deleted partition recovery and inaccessible data . The advanced Partition Recovery application is compatibile with Windows 7, Vista, XP, 2003, and 2000. The tool provides a set of impressive features such as, disk cloning, disk imaging, drive status, RAW file recovery, and more.

Read more »

How to Get Over From Blue Screen Due to 'Bad Pool Caller' Error?

Blue screen error occurs due to variety of reasons which constantly makes computer system unreliable. Once such blue screen error occurs because of 'bad pool caller' which signifies that there is some problem with your computer hardware or software application and should be fixed immediately to avoid heavy damages.

This article provides the detailed information about basic facts behind this error and methods to fix it manually as well as automatically.

Reasons behind 'Bad Pool Caller' Error:

Basically, it occurs due to Windows system file corruption (an important parameter responsible for overall health of your PC), resides under the 'Data Pool', a repository of important windows files allowing Windows to read them. When Windows fails to find any files which it needs to run, Windows crashes & reboot again and again.

There are many reasons behind Windows system file corruption, such as:

• Interrupted or unfinished Windows installation
• Hardware problem
• Damaged or corrupted registries
• Malware/Virus attack
• Faulty computer application
• Human errors
• Accidental deletion of booting files

Any of the aforementioned actions will end up with 'bad pool caller' error. So, avoiding occurrences of these nightmares could be best option to stay from blue screen errors due to 'bad pool caller'.

Resolution Steps:

• Fix Registry: The first and foremost important step is to fix damaged system registries. You can use various registry cleaner tools like CCleaner or Stellar registry manager to resolve registry errors ASAP.

• Uninstall & Reinstall Affected Programs: Find the affected computer programs and uninstall them. However, if you need that program desperately, You are allowed to install a fresh copy of it. To uninstall any program, go to Start > control panel> add/remove programs.

• Look around Hardware: Many times we get this error due to any malfunctioned hardware such as bad hard drive, damaged RAM, faulty cables, malfunctioned chipset etc. which may prevents Windows to read settings or important files that it needs to start. You should start making sure that there is not any hardware problems like clicking noise from hard drive, broken cables or short circuit RAM.

• Windows Repair: This is indeed effective and powerful revolutionary steps which fix bad pool caller error automatically. You have to have Windows installation disc to repair Windows. Once you have the disc, follow the below explained steps:

a) Insert CD into CD ROM and boot system using it

b) Press 'R', when 'Welcome to setup screen appears'

c) Follow the onscreen steps & Windows repair will start. Your system will reboot automatically after process finishes.

Read more »

How to Perform In-house data Recovery From damaged storage media

In many instances, personal PC user or small size business suffer to lose their valuable data due to uncountable reasons like software damages, registry corruption, malware attack, hard drive corruption etc. Data loss situations cause by various mishaps those are difficult to deal with and give complete inaccessibility to any precious data.

Here are some quick fix steps to easily recover data from almost any type of storage devices like hard drive, memory card, flash drive etc. The recovery steps can be performed by any normal PC user or small sized business those generally won't capable to pay huge bunch of money charged by any recovery firm. They just have to download the standard data recovery program from trusted source to save their money, data and efforts. These steps can be performed at home, office or whichever location user would prefer. 

#1 ) Using the problem media even after crashes will increase the risk of data being corrupted or overwritten. So, prevent the problem media to being used by anyone unless the complete data has been recovered. Any data recovery software won't capable to efficiently search or locate the deleted data that is overwritten or severely corrupted. In that case '100% data recovery is not guaranteed' 

#2) Downloading an efficient program for better results could be biggest hurdle for normal user. Any wrongly chosen software can cause you to lose your whole invested money as well as the precious data. So, take steps wisely and consult with any trusted source about which software to choose. Check out an amazing product review done by PC Advisor, which could help you to choose the right software.

#3) After installing software, you could see a home screen window containing various options like 'Quick recovery – For Fast searching and quick recovery', 'Deleted File Recovery – Search and list only deleted files', 'Lost/deleted Partition Recovery- Recover partitions which is deleted or lost either accidentally or intentionally' etc. These options are lot more helpful in recovering important files that get lost/deleted due to whatever reasons.

All you need is to connect the problem media externally and start scanning procedure by choosing any option according to your data loss condition. E.g., you had deleted some files accidentally and don't know where it has gone, then 'Deleted file recovery' is the option to successfully recover the maximum amount of deleted data.

 #4) After some time, the software will list all the existing as well deleted files or partition and you can efficiently save files to any desired place.

Note: Don't use the same drive to save your recovered data. 

#5) Many software comes with an amazing functionality, that is to recover data from cloned or image copy. So if you have taken an image or cloned the drive, software will help you to recover data from that image as well.

Read more »