INFORMATION TECHNOLOGY

If you are getting the message “DNS Error – cannot find server” whenever you try to access a website, this means your computer cannot associate the name of the website, such as google.com, with its IP address 74.125.43.99. DNS problems can occur through misconfiguration with your network or problems with a specific website, which you can do nothing about.

Fixing DNS Problems

The following steps should help you correct issues you’re experiencing with websites not loading or if you’re receiving the error Oops! The Link Appears Broken “DNS Error – cannot find server.” Or in IE you might be getting the error “The Page Cannot Be Displayed.”

Is the problem with your network or a particular website? To test this, just go to another site–one you haven’t visited before. If the website appears, then the DNS problem is likely due to a problem with that specific site. To test, try using that website’s IP address instead of the actual name. In our example with Google above, we used the IP address of their site. To find a website’s IP address, go to a site like IPLookUp.Net and type in the name of the site. You will get their IP address. Next, type the IP address into your web browser (example: http://74.125.43.99) and see if the site appears. If so, there is a DNS problem.
Try refreshing the page. Hit F5 on your keyboard to refresh the page. If the site was down, you might be seeing a cached page. Refreshing the page might bring it back up.

Is the DNS problem browser-specific? If you have more than one web browser installed in addition to Internet Explorer, such as Firefox or Google Chrome, try opening web pages and see if they load. If they do, then the problem lies with your web browser and not your network. Try clearing the cache on your browser and see if that resolves the DNS error.

Try rebooting your network. Power down the computer, the router and the laptop. Let them sit for a few minutes, then power up in reverse order, starting with the modem, the router, then the PC. Give each a minute to fully boot. If there was some type of outage, this should reset all network components.

Check your IP address information. DNS settings are stored in your router, and you’re likely get your IP address from your router. Check your IP address for problems by clicking the Start button then type cmd and hit OK. At the command line, type ipconfig /all. You will see your network adapter, along with some information about your gateway and DNS servers:


In the above example, the router (Default Gateway) has an IP address of 192.168.0.1 and the DNS servers are listed below that. Your IP address should resemble the IP address of the router–something like 192.168.0.2. If your DNS servers are 0.0.0.0, then you have a problem with the router’s configuration.
First, try flushing the DNS settings from the router. At the command line, type ipconfig /flushdns and then hit enter. Then type ipconfig /registerdns and hit enter again. This should remove old cached DNS entries in the router. If this doesn’t work, try specifying new DNS servers in the router.

Login to the router via the web browser and specify new DNS servers. Since all routers handle this differently, you should look for instructions from your router’s website. For a Linksys router, go to http://192.168.1.1 in your web browser and login. Look for the Setup tab and make sure your router is set to Obtain IP Address Automatically. If not, change it and reboot the router after saving. Upon reboot, the router should get updated DNS server settings.

If you want to specify static DNS servers, such as OpenDNS, change from the setting from Automatic to Static in your router configuration and put in the following two DNS servers: 208.67.222.222 and 208.67.220.220. Save and reboot the router and your computer.



Try plugging directly into the modem. If you’re unsure about the router configuration, try plugging your computer directly into your modem if it is a separate device. Some modems and routers will be integrated, but some will not. If you can, bypass the router and plug the Ethernet cable directly into the Internet port of your modem and reboot both devices. Upon reboot, your modem will be speaking directly with your computer, and if you are able to get onto the Internet, you know the problem is in your router’s configuration. Try resetting the router to default and integrate it back into the network.

You can easily recover deleted files using the Windows 7 Previous Version tool. If you had been working on a document and deleted it by mistake, or if you had changed a document and accidentally saved over it, you can recover the old version in a few simple steps. For this to work, you do need to have System Restore enabled so it can automatically create restore points for you to recover the document from.
You will first need to make sure backups were being created to begin with. To make sure System Restore is enabled on your PC, right-click Computer and select Properties. Next, click the System Protection tab and then click on the drive you want to enable (Usually the C: drive) and then click OK. This will turn it on if it was off.
If System Restore is already enabled, then you have the ability to recover a previous version of a document and you can do so from the following steps below.
How To Use Previous Versions in Windows 7
To recover a the previous version of a changed document in Windows 7, open the folder where the file had been stored and then right-click anywhere in open space. Next, select Properties and click OK.

The Properties screen of that folder will have multiple tabs across the top. Click the Previous Version tab.

You will then see numerous versions of changed and deleted files in that folder based on the restore points that were automatically created by Windows. Select the version time and date you want to revert the document back to and then click Open.

You will then see the previous versions of all of files in that folder based on the time and date you selected. You can now recover any of those files by right-clicking the file and selecting Send to and then by choosing the folder you want to save it to. In the example above, we are recovering a deleted file from the My Documents folder and returning it back to the same Documents library.

As you can see, the deleted document is back in the Documents library where it had accidentally been deleted from. This was all possible because System Restore had automatically taken a snapshot of my files and I was able to recover deleted files using Previous Version in Windows 7.

Acronis Hard Drive Monitor is a great utility for  monitoring the hard drives installed inside of your PC. Acronis specializes in hard drives and provides both commercial and free programs. The Acronis Hard Drive Monitor is one of their best free programs and is a great way to keep an eye on the physical condition of your hard drive’s health before something bad happens and you lose all of your data. If this program recognizes a potential problem it will either generate an email or notify you through a pop-up alert. Because it’s continuously monitoring the state of your hard disk, you never have to remember to run the program after installing it.

Installing Acronis Hard Dive Monitor

1. Download the program from the Acronis website.
2. Run the Acronis Drive Monitor setup file.
3. From the Install Menu, click on the Install Acronis Drive Monitor to launch the installation process. An installation wizard will follow.
4. Read and accept the Acronis Drive Monitor license terms.
5. Choose where to install the program. Default options will be fine.

You can run the program following installation by clicking the new icon on your Desktop or by navigating through the Start menu to Start>All Programs>Acronis>Acronis Drive Monitor. When you launch the program you will see a summary of the drives installed on your computer and any alerts associated with them. You will see yellow warning icons if minor issues have been detected or red icons if there is a serious problem. If everything is fine, you will see a green check mark beside the drive.



In addition to monitoring your hard drive, this program will occasionally remind you to perform backups of your data. You can either use a solution through Acronis or manage a backup strategy on your own. You can read our article on data backup methods for more information on backing up your computer. Remember, it’s not “if” your hard drive will fail, it’s “when.” So make sure you monitor your drive and always have a backup of your data.

 

Sering kali masalah ini aku lalui.Bila guna win7 pastu nak connect ke LCD projector memang kadang-kadang ada masalah.Kalau menggunakan win XP,senang saja,auto- detect tapi kalau win7,lain sikit.Aku dah jumpa cara mudah juga la.(terpulang pada masing2 punya cara)

Ikut langkah ni.
1.Tekan butang Windows yang ada pada papan kekunci anda (keyboard) diikuti dengan huruf P. Win +P 

2.Melalui Start Menu, taip DisplaySwitch.exe kemudian enter.

Pernahkan anda mengalami masalah seperti ini?anda tidak dapat membuka Command Prompt (cmd) komputer anda? Command Prompt merupakan salah satu kompenen penting dalam sistem operasi Windows,Command Prompt ini mempunyai banyak kemudahan termasuk membaiki sistem operasi anda,mengenalpasti virus yang ada pada komputer anda dan sebagainya.
Kebiasaannya,virus komputer akan menyekat anda untuk menggunakan fungsi ini…Ini kerana dengan menggunakan Command Prompt + sedikit kemahiran ICT anda dapat mematikan proses sekaligus membuang virus-virus yang telah menjangkiti sistem operasi anda.
Bagaimanakah caranya untuk memasuki Command Prompt ini?
Windows XP : Klik pada butang Start Windows,kemudian klik pada “RUN” dan taip CMD.
Windows 7 : Klik pada logo windows  @ butang Start ,kemudian pada ruangan kosong ” Search programs and files” taip CMD.
Jika anda tidak dapat memasuki perisian tersedia Command Prompt yang ada pada sistem operasi anda,kemungkinan besar ianya adalah disebabkan virus.Anda tidak perlu risau kerana anda boleh menggunakan perisian altenatif yang berfungsi sama seperti Command Prompt ini.
Untuk muat turun perisian tersebut secara PERCUMA,sila ke pautan berikut :
http://www.gammadyne.com/gs.exe

Disini ada beberapa jenis software yang digunakan untuk mengoptimumkan rangkaian.Berikut merupakan software tersebut:

1. CMDTime NTP Utility - http://www.softshape.com/download/
2. Ethereal Protocol Analyzer - http://www.ethereal.com/
3. NMap - http://www.insecure.org/nmap/
4. Ntop - http://www.ntop.org
5. PingPlotter - http://www.pingplotter.com
6. PuTTY - http://www.chiark.greenend.org.uk/~sgtatham/putty
7. RAS Graph & Stats - http://www.trvx.com/rasgs/
8. RealVNC - http://www.realvnc.com/
9. TightVNC - http://www.tightvnc.org/
10. UltraVNC - http://ultravnc.sourceforge.net/
11. WinSCP - http://www.winscp.com/