IT Queries: Computer problems answered

I bought a Mac because I was fed up with my kids infecting the family computer. Now I’m reading Macs may be more vulnerable because virus writers attack popular computer systems. Is this true and should I get an anti virus for my Mac?

The short answer is “no”. The “big target” story is peddled by people who either have no understanding of computer security or have an interest in selling anti virus software.

In reality the bad guys go for the easy targets and in the world of computer security there’s no easier target than Windows.

In a recent Security Intelligence Report, Microsoft pointed out the first version of Windows XP was by far the most susceptible to viruses. This was due to lousy security (the built in firewall was disabled in XPs early versions) and countless security bugs.

But the main reason for Windows being the malware writers’ favourite operating system is Microsoft’s decision to let Windows users run as Administrators with full control over changing system settings and install software.

Most other operating systems, including Apple OSX, insist users run in without the ability to change system settings.

This fundamental flaw leaves most Windows users wide open to malware infections. Virus and spyware writers just have to get access to the machine and simply visiting a website offering free games, pornography or music lyrics is enough to get many systems infected.

While it is important to take security seriously on all operating systems, including Linux and OS X, by making sure you update security patches and keep your system behind a firewall, Windows has the biggest problems.

Don’t be panicked by ignorant or dishonest advice.

Where the deleted matter goes after deleting a file? i know it goes in the recycle bin but even after deleting from there where does that file goes. is there any software incorporated in the system which receives the file or whatever the reason is please clear the doubts.

When you empty the recycle bin on a Windows computer the files don’t actually go anywhere. Instead Windows adds a character, usually shown as the “$” sign, to the beginning of the file’s name. This marks it as unreadable to the computer.

Because the computer doesn’t see those files it thinks the space on the hard drive is empty and eventually the files are overwritten by newer information.

The problem is that leaves a period where they can be recovered. A good tool for doing this is the Restoration program which we’ve discussed previously in our Recovering Deleted Files post.

If you are concerned about fully removing deleted files, then you’ll need a “shredder” program such as Eraser which we looked at in our Clearing Out a Computer post.

Eraser is a very powerful tool which will clean up deleted files but be careful because if you click the wrong button, you may wipe the entire computer.

As you recommended in your checking a disk for errors column, I ran Check Disk and it said I have “Bad Clusters”.

What does this mean?

Basically your hard drive is dying. Bad blocks mean there is damage to the surface of the disks and its a matter of time before your system stops working.

The first thing you must do is backup your data. Make sure everything valuable is off your computer.

When you’re happy everything important has been saved, get the computer to your local computer shop. They’ll be able to tell you whether the computer is worth repairing or if the costs are better spent on a new system.

Windows explorer crashes on start up with Win XP Pro SP3 also crashes Dr Watson then PC freezes – restart usually same except PC doesn’t freeze. All ok with safe mode then crashes on normal reboot.

The problem is something problematic is loading when the computer starts normally.

While in Safe Mode, uninstall any old software you don’t use and clean up your hard drive using Disk Manager by clicking Start, Programs, System Tools and Disk Manager.

Once disk manager scans your drive, tick all the boxes and allow it to run.

When that’s finished check your disk for errors, this will require a reboot.

If serious errors are found on the disk, or the problem still persists, it may be necessary to access to drive from an emergency disk to repair any virus or remove data from a dying drive. This is best done by a technician.

The Windows Scripting Host is an important part of all Windows versions later than the first version of Windows 95. It automates various functions and it’s critical to operation of various Windows features like Automatic Updates.

It does have some problems however and using it to infect Windows computers through “drive by downloads” has been a favourite trick of virus and spyware writers in recent years.

While it does create security problems for Windows users, it is an essential part of the system so you need the latest updates for it.

Microsoft have a number of updates for Windows Scripting;

• Windows XP and Server 2003 users should download Version 5.7
• Windows 2000, 98 and ME users should use Version 5.6.
• Vista users should use Windows PowerShell

It’s best to download and install the appropriate package and then run the Windows Update program.

My computer says “says out of range input1: dvi-55.9khz/46hz”

What is the problem?

For some reason your screen resolution has changed and the monitor can’t handle the signal.

To fix this, you’ll need to start your computer in Safe Mode and then change the screen resolution.

In Windows XP, you’ll need to click Start, Control Panel and Display.

Once in the display screen, click on the Settings tab and move the sliding Screen resolution setting to the left.

Click okay and restart the computer.

My son attempted to uninstall limewire, my computer is now misty and wiil not switch off and simply refuses to do anything, help.

You’ll need to go back to a system restore point as we describe in previous question. 

However to do that you’ll have to turn off and restart the computer. The easiest way to do this is to hold the on/off button in for ten seconds and it will turn off.

Once the system’s running again follow the instructions on how to reset to a previous point.

It may be this is not Limewire’s or your son’s fault. It could be a different hardware problem as screens “going misty” usually indicates something like a video card problem.

See how it goes and post another query if the system restore doesn’t work

Up-graded my PC including a new hard drive and installed Windows XP Pro and applications on it including Office.  Where should I look for the address book and how do I open it?

On Windows XP and earlier systems, Outlook Express uses the Windows Address Book. This is usually hidden deep in the user profile in a hidden folder.

First, you’ll have to change your computer settings to so you can see your hidden folders. Once you have set this, you’ll have to find the address book file which is usually hidden in c:\documents and settings\yourname\application data\microsoft\address book and finishes in the name .wab.

Keep in mind when you are importing off an old hard drive, the drive letter will not be c:

To import the old address book into the new book, open your new address book by clicking the address icon at the top of the Outlook Express screen.

In the adress book click the File menu, select import and Address Book (WAB) then navigate to the old address book locations. Highlight the address book and click Open. The wizard will then run you through the process.

Many important files are hidden in Windows XP and Vista. The reason for this is to protect critical system files from being accidentally deleted.

Unfortunately many data files such as address books are also tucked away in hidden folders, which means it can be difficult to find them.

To view these hidden files and folders, there’s a few settings to change in Windows. We recommend only doing this when you need to, such as when you are looking for Outlook Express data files or Windows Address Books. When you are finished, you should turn the settings back on.

Windows XP

Open My Computer, select the Tools menu and click Folder Options.

In the Folder Options windows select the View tab. Click the Show hidden files and folders button and below that take the tick off the Hide protected operating system files box.

A box may appear explaining what you are doing and asking if you are happy with this, click Yes.

Click the Apply button and then the OK button and shutdown My Computer.

Now your computer is configured to show all hidden files.

Windows Vista

Click on the Start button and select the Control Panel, click on the Appearance and Personalization link and click on Show Hidden Files or Folders.

In the Hidden files and folders section select the button labeled Show hidden files and folders and remove the tick  from Hide extensions for known file types below this, remove the tick from Hide protected operating system files.

Click the Apply button and then the OK button and Windows Vista is configured to show all hidden files.

Remember that it’s best practice not to be able to see these files as this reduces the risk of accidentally damaging or deleting important system components, so once you’ve found the hidden or system files turn the hide setting back on again.

When we access the start menu, click on icon for Media player it comes up on the task bar but no window, it would appear to be hidden behind what ever screen is open at the time.

What’s happened is the media player has been accidentally dragged off the screen. The quick way to fix it is to right-click the task bar icon and  select Maximize.

If you want to fix the problem permanently and select Move, then use the arrow keys to move the program back onto the screen.