One of my friends' portable hard disk was infected with virus like new folder. I brought it to my house to copy some data to it. I have installed Symantec Antivirus. Whenever I try to insert the USB cable in port, the computer hanged. I tried many times. I then, disabled Antivirus. Later on, while I try to open a drive of infected hard disk, it showed an error message called "Error Performing Inpage Operation".
I thought it was due to some paging error and concluded that the hard disk was not of good quality as it was of some unknown brand. So, finally, I have to delete the partition and format the drive from Disk Management utility of Windows.
Later on, one other friend informed me that he has same problem. Now, this time it was in his local hard disk, I mean not portable hard disk. As the data was important this time, I googled in the Internet. After so many predictions, I finally found a appropriate solution.
The solution was to use CHKDSK utility of Windows. From Command prompt (windows + R), type the following command.
C:\chkdsk <infected drive> /f /R
/f switch is to fix errors in disk.
/R switch is to locate bad sector and recover readable information.
This worked like magic. So, I suggest to try this command, if you are having same problem in your computer.
In today's computer world, Web Applications are creating havoc. The much growing popularity of web applications has forced to define the meaning of Information Technology in different way. Also, the line between Windows and Web Application is blurring. In web applications also, today most of facilities are provided to users through use of add ons, activex controls, dlls and other supporting applications, requiring users to install these tools also.
My concern here is comparative study of window and web applications.
Most of people may think that web applications are better. Today, internet connection and Ethernet connection has reached top speed. So, no difference is left in putting the application in local computer or server in context of speed. Web applications can be run in thin client. A simple browser is sufficient for a client machine to run a heavy web application. Heavy softwares need not to be installed in client machine. It is easier to publish a web application in internet, so that, users can access application from any where. It becomes more reasonable when an enterprise application is published and accessed by user from remote area. Today, most of top enterprise solutions, ERP, CRM like SAP, Microsoft Dynamics, Ramco are being deployed in web based environment.
But there are numerous places where web applications fall behind windows applications from developers and users view also. Web applications are much tougher to develop compared to windows applications. Though, the o/p looks of web applications may be much cool than windows applications, it is difficult to work out through style sheets of web applications. In windows applications, it is just a drag and drop. Also, much of controls are available in windows mode only. While developing web application, a much percentage of time has to spend working in decoration of web site. The use of icons in toolbar of browser is also a much problem for developers. A developer has to consider the possibility of user to click back, forward, refresh button in browsers. Today users are also clever to modify address in address bar of browser which has also to be taken care. Despite taking so much care to develop a web application, the o/p is low compared to a windows application. Users are generally not much comfortable with web applications. Users cannot work with multiple sub-screens at the same time in web based applications. Generally, web based applications do not have provision for short cuts keys, which also degrades performance of users. Also, much user controls like datagrid, tree are not usually provided in web applications.
Every thing has pros and cons. Thus do have windows and web applications. Web applications are easier to deploy but are much vulnerable and tougher to develop. Windows applications are easier to develop but become costlier requiring thick client.
Virus, Trojans, spams have brought down top IT companies to its knees. It's no doubt that these also degrade performance of one's computer. I have included herewith top symptoms of a computer being affected by a virus.
- Your computer becomes slow. In Task Manager, unusual processes like svch0st.exe (instead of svchost.exe), lsasss.exe (instead of lsass.exe) would be running. Also, processes with absurd names are running.
- Your computer behaves in unusual way. Suppose, if you click up button on tool bar, a warning message is displayed indicating that your computer is affected by virus. In fact, the virus or adware itself is displaying this message. The adware then directs you to its website suggesting buying their antivirus. You should be much careful of these advertisements.
- Many often warning messages are displayed unusually. The warning message can be in different language like Arabic, Chinese, etc. This is also result of unwanted products installed in your computer.
- Your computer takes a lot of time to start. A lot of programs are selected in startup. You can check this out by typing msconfig in run and clicking startup. Most probably, if your computer is affected by virus, msconfig is disabled. Either it closes suddenly after opening or message like "Msconfig has been disabled by Administrator".
- Many often virus disables Task Manager. If you try to open task manager by pressing Ctrl + Alt +
- Your registry is most like thing that is disabled by virus.
- Critical error messages are displayed. Sometimes a blue screen is displayed showing memory dumping starting from 0 to 100%, after which computer restarts. It is also likely that your computer restarts automatically and many often.
- The most likely symptom of affecting by adware is that, when you open Internet Explorer or other browsers, some messages are displayed like incorrect flash version is installed, compute is affected by virus, etc. It may be also likely that your page or home page is automatically redirected to some other page.
- Unnecessary files are created in C: or system32 or windows folders.
Labels: Windows
Task Manager may be disabled in your computer due to virus or intentionally disabled.
If you try to open Task Manager, it may show message like "Task Manager has been disabled by Administrator". You can enable or disable Task Manager by two methods.
Group Policy Editor
Go to Start -> Run
Type gpedit.msc and press Enter.
In the left pane of new window opened, navigate to User Configuration -> Administrative Templates -> System -> Ctrl+Alt+Del Option.Then, in the right pane, double click Remove Task Manager.Set its state to Not Configured to enable Task Manager and Enabled to disable Task Manager
Registry Editor
Go to Start -> Run
Type Regedit and press Enter.
Navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
In the right pane, add new DWORD value with name DisableTaskMgr and set its value to 1, to disable Task Manager.
Similarly, if you want to enable Task Manager just delete the value with name DisableTaskMgr.
Labels: Windows