If you are using Windows 2008 R2 operating system, you may receive the following error while installing Visual Studio 2008 or .NET Framework on your server:

You must use the Role Management Tool to install or configure Microsoft .NET Framework 3.5

This is because Windows 2008 R2 comes with pre-installed .Net Framework 3.5.1. You just require to enable this feature from “Server Manager”.

Using Role management tool, you can easily enable .Net 3.5 framework on your web hosting server or development server.

Affordable Windows Hosting just $4 + FREE Domain Registration + ASP.Net Hosting

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Android is software for mobile devices that includes mobile operating system and key applications. Android is based on Linux kernel. Android is an open source application and you can download Android Software Development Kit from here. This tool provides necessary APIs to develop applications on Android platform using Java programming language.

Current Features:
- The platform is adaptable to both larger, VGA, 2D graphics library, 3D graphics library based on OpenGL ES 1.0 specifications, and traditional smartphone layouts.
- The Database Software SQLite is used for data storage purposes.
- Android supports GSM/EDGE, CDMA, EV-DO, UMTS, Bluetooth, Wi-Fi and other connectivity.
- Integrated web browser available.
- Android will support advanced audio/video/still media formats such as MPEG-4, H.264, MP3, AAC, OGG, AMR, JPEG, PNG, GIF.
- Android is fully capable of utilizing video/still cameras, touch screens, GPS, accelerometers, and accelerated 3D graphics.
- Software written in Java can be compiled into Dalvik bytecodes and executed in the Dalvik virtual machine, which is a specialized VM implementation designed for mobile device use, although not technically a standard Java Virtual Machine.

For more details, on Google Android, kindly visit Android (operating system) and What is Android?.

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Sometime you receive the message “Task Manager has been disabled by your administrator” when you press ALT+CTRL+DEL or the option “Task Manager” is disabled. It may possible that Task Manager has been disabled or it may be possible that it has been disabled by any virus or Trojan.

You can get rid of it by following the below steps:

[1] Edit Registry value:

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System]
"DisableTaskMgr"=dword:00000000

Write the above code in notepad and save it in .reg format and then double click on it. It will add the required entry in Registry to enable Task Manager.

[2]
- Open Registry (Start -> Run -> regedit)
- Navigate to following path:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
- From right-side, delete the value named DisableTaskMgr and close the registry editor.

In most cases, one of the above solution works.

For other solutions, you may refer Microsoft kb 555480

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Windows 7 is the next version of Microsoft Operating system. Windows 7 will be available for 32 bit and 64 bit editions. It will have both client and server versions. So far there are three Builds released for this new operating system. But still the beta version is not available for public to
test it. The builds are Milestone 1 (M1), Milestone 2 (M2) and Milestone 3 (M3). Microsoft will distribute a new pre-beta build of Windows 7 at its Professional Developers Conference. According to Softpedia, the first beta will arrive in December 2008. So far, Microsoft has not announced the release date of Microsoft Windows 7 operating system.

Kevin

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An Operating System (abbreviated as OS), is a software that is responsible to manage the system resource. An operating system contains many applications in it.  Operating system is directly handle the request which are received from Hardware devices (i.e. Keyboard, Mouse, Motherboard etc.).

There are many operating systems provide GUI (Graphical User Interface) through which you can manage it and some others provide CLI (Command Line Interface). It is easy to manage the Operating system which provides GUI. For CLI operating systems, you should have strong knowledge of commands.

Now a days, most cmmonly used operating systems are Windows, Linux, Unix, Solaries, CentOS etc. Some of them are commercial version and you will need to purchase the license to use it.

Linux is the open source and hence it is freely available. However if you want enterprise edition of Linux then you will need to purchase the lincese for Commercial version.

Kevin

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3. System is not booting

What is FSCK? Why is it required? There are several reasons behind the system file corruption. For example, you forgot to shut down your system properly, suddenly cut off the power supply, a storage device was removed when system is in process to write the data on it, accidentally press the restart button of your system.

In Linux some data is kept in the memory before it is written to the disk. This speeds up the process and it used in many systems including Windows OS. If the system is turned off or improperly shut down before it writes the data from memory to disk then there is a chance of the system file corruption. Hence, it is required to shut down the system properly. During improper shut down, the file systems are unmounted from the memory. FSCK will unmount these file systems during boot automatically. You can also run FSCK program manually using the below command:

To check root file system:
fsck -V -a

For all other than root file systems:
fsck -R -A -V -a

The last command will check everything except root (-R) file systems.

You can also tell fsck to show what it did using echo option as below:

fsck -A -V ; echo ==$?==

The fsck codes are listed in the below table:

Code Explanation
0 No errors
1 File system errors corrected
2 System should be rebooted
4 File system errors left uncorrected
8 Operational error
16 Usage or syntax error
128 Shared library error

Generally, fsck repairs the file systems automatically. If it fails to repair the file systems then you probably have a corrupted superblock.

Kailash Aghera

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2. Operating system

You have seen the message “Boot disk failure” while starting your PC. The problem behind this is that the hard drive is detected but the operating system doesn’t load. You will need to reinstall the operating system or you will need to rebuild your master boot record to fix the boot problem. Below are few troubleshooting options to get rid of:

If you are using the dual boot system then it may possible that the boot loader getting corrupted. For example, you have a system running Windows XP and Linux using Lilo as boot loader. If Lilo gets corrupted, you can not boot in either operating system. In such situation, you have to boot into the system using some other media such as floppy or Windows CD. After booting go to the command prompt, type fdisk /mbr and hit enter key. If you are using Windows 2000 or Windows XP then boot into the recovery console and shoot out the command fixmbr to clear the MBR (Master Boot Record). After restarting your system, it will boot to Windows directly without any booting option. Now, you can reinstall the Lilo from your Linux CD or you can install the boot loaders such as XOSL from Windows.

If you are not using the dual boot system then boot into the system through floppy or Windows CD. If you have Windows 2000 or Windows XP, you should boot into the recovery console. Go to the command prompt and give the command fdisk /mbr and then give the command sys C:. It will clear the MBR (Master Boot Record) and makes the bootable partition C:. Windows 2000 and Windows XP users should give the command fixmbr and fixboot C: to do the same. Then restart your system.

If you are still receiving the error then you might have a virus on your PC’s boot sector. In such case, connect your hard drive to another system and scan with an anti virus software.

Kailash Aghera

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Sometimes, you may receive an error “Invalid boot.ini file. Booting from c:\winnt and then after your PC boots normally. You are receiving this error because boot.ini is either missing or corrupted. To resolve this problem on Windows 2000 operation system, create a boot.ini file in C: drive with following contents:

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINNT
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINNT=”Microsoft Windows2000 Professional” /fastdetect

This is not applicable if you have Windows XP or more than one Windows operating system. In that case, boot using the Windows CD and when you see the “Welcome to Setup” message, press [R] to start the Recovery Console. If you have more than one Windows operation system then select the one for which you want to created boot.ini file. At the command prompt type the below command:

bootcfg /rebuild

The above command scans the hard disk for Windows installations. Follow the on-screen instructions to add entries into boot.ini for all Windows installations. If you have dual boot (installed two windows operating systems) then you will need to mention in [operating systems]. This will allow you to select the operating system during the boot.

Boot.ini works as a boot loader if you have installed multiple Windows operating system. But if you have installed other operating systems viz. Red Hat Linux etc. then it will install its own boot loader. For example, Red Hat Linux will install the boot loader called LILO. In case if LILO gets corrupted then you will not be able to boot in your Windows operating systems. You will need to reinstall LILO to fix the system boot problem.

Kailash Aghera

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3. Missing msconfig in Windows 2000

Unfortunately, msconfig is not included in Windows 2000 operating system but there is another way to check which programs are loaded with Windows and you can also remove it from the start up. First, go to startup folder from the start menu and delete the shortcuts you do not need. Now, go to the registry (Go to Run from start menu and type “regedit”). In registry, go to the below location:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Currentversion\Run

Each key in this folder starts an application when we start our system. Remove the key that you do not want to start during the system start. However, it is advisable that do not remove any program that is located in the C:/winnt or C:/windows directory because they can be operating services.

Another option is to try to copy msconfig.exe file from Windows 98 or Windows XP installation and use it on the Windows 2000 system.

Kailash Aghera

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