how to test your anti-virsus good or not

How To Test your anti-virus software

Creating a test virus

Have you ever wondered if your anti-virus software is really working? Would you like to see what happens when it detects a virus? Here's a safe way to test your computer's virus protection that doesn't require you to have a real virus sample.

First, open Notepad. Then copy and paste into it the text on the line below. (It should all be on one line.)

X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*



Then select File, Save, select All Files for the file type, then save the file as eicar.com. The result should look exactly like the screenshot below:


Your anti-virus software may prevent you from saving the file as eicar.com, which is a sign that it is working effectively. If it doesn't raise an alert, try scanning the folder where you saved eicar.com. To see what happens if you try to run a file containing a virus, double-click eicar.com to open it.

Explanation
The file eicar.com you have created is completely safe. It is not a virus. It is a standard test file developed by the European Institute for Computer Anti-virus Research (EICAR). All anti-virus products are programmed to detect this file as if it was a real virus. Therefore you can safely use it to test whether your anti-virus software works, without fear of infecting your computer.

If your anti-virus product should fail to prevent you from running the file, it will simply display the text "EICAR-STANDARD-ANTIVIRUS-TEST-FILE" in a DOS box. No harm will have been done, but you should probably consider using a better anti-virus product, because if it had been a real virus, your computer would by now be infected!

how to speed up windows 7 very fast working 100%

   WINDOWS 7 SPEED UP TIPS




Turning off Automatic Disk Defragmentation:
The automatic disk defragmentation feature of Windows 7 makes it a little slow; instead you can disable this function and run the disk defrag once a week. For disabling this you need to do the following:

1. Go to Start> Computer
2. Right Click on C: Drive and click on Properties
3. Select the Tools Tab and click on Defragment Now
4. Uncheck Run on a schedule option




Using Readyboost:
Using the ready boost feature you can use a pen drive and increase your system performance. The drive acts as an extra RAM. To use this feature you need at least a 2GB USB drive. I didn’t have a 2GB though. Follow the below steps to use this feature:

1. First connect the USB Flash Drive to your pc
2. Then go to Start> Computer
3. Right Click the USB Drive in My Computer and select the Ready Boost Tab
4. Choose Use this device
5. Select as much space as you can free up for RAM usage vs. Storage


Disable transparency of windows:
The transparency of windows is really awesome but it might not be great for users who don’t have great pcs as it slows down the performance. You can disable the transparency in windows by following the below steps:

1. Right click on the desktop and select Personalize.
2. Select the theme and then go to Windows Color.
3. Uncheck Enable Transparency.



Disable UAC (User Access Control):
UAC isn’t that annoying as it was in Vista. But, if you still don’t like it then you can disable this feature by following the below steps:

1. First go to Start> type msconfig in the search bar and hit enter
2. Go to tools> Change UAC settings
3. Click on Launch, set the option to ‘Never notify’ and press ok.
4. UAC will be turned off once you restart your pc.



Turn off unwanted features:
There are may be several features which are not really required. These features might slow down your pc. You can disable such features by doing the following:

1. First go to Start > Control Panel> Programs and features.
2. On the side menu, click on Turn Windows features on or off.
3. Scroll through the list as shown below and remove the check from any feature you do not want installed.
4. Click OK once you are done. The features will now be uninstalled.



Disabling min/max animations in windows:
You might just love the minimizing and maximizing effect in Windows. But after a few days of use, some of you may get irritated as it will increase the minimizing and maximizing time of windows. Well, I have a different opinion here though, I like the minimizing and maximizing effect. To disable this function you can do the following:

1. First click on the Start Menu enter SystemPropertiesPerformance in the search bar and hit Enter.
2. On the Visual Effects tab uncheck Animate windows when minimizing and maximizing.
3. Click OK.





Disable unwanted Windows Services that Auto-Launch at Startup:
1. Go to Start and type ‘msconfig’ in the search bar and hit enter.

A new window will pop up, on the ‘Services Tab’ deselect the following:

1. Offline Files (unless you’re using Offline File Sync)
2. Tablet PC Input Service (unless you have a tablet PC)
3. Terminal Services
4. Windows Search (If you have already disabled indexing)
5. Fax (unless you’re using a fax modem)




 Turning off Windows Hibernation:
Windows hibernation might use a large amount of system resources. If you don’t really use this feature then you can disable hibernation by doing the following:
1. Go to start> Control Panel> Power Options.
2. Now click Change Plan Settings.
3. Click on Change Advanced Power Settings.
4. Expand the Sleep selection.
5. Expand the Hibernate After selection and enter zero on the box.
6. Click Apply.

Speed up external hard drives:
Write caching is disabled in external drives as it allows you to connect and disconnect any external drive frequently, but in case if you have a drive which is hardly disconnected then this feature might just decrease your performance. You can enable this feature if you are not disconnecting your external drive frequently by doing the following:

1. Go to Start, then right click on Computer and select Manage.
2. Click on Device Manager on the side menu.
3. Expand Disk drives and locate your external drive from the list.
4. Right click on the drive and select Properties.
5. On the Policies tab, select Optimize for performance.
6. Next, check ‘Enable write caching on the disk’ and ‘Enable advanced performance’.
7. Select OK and restart your pc.



Enhance SATA disk performance:
You can improve the performance of your hard disk by enhancing write caching. But in case you have frequent power cuts and no battery then I strongly recommend you not to do this as there is an increased risk for data loss or corruption. You can enhance your writing cache by doing the following:

1. Go to Start and in the search bar type Device Manager and hit Enter.
2. Expand Disk Drives.
3. Right click on your hard drive and select Properties.
4. On the Policies tab, check ‘Enable write caching on the device’.
5. Click on OK and close Device Manager.

make xp to genuie version of windows xp working

 This is the way for make windows to genuie version of windows xp 100% working tricks

1 . Go to Start > Run >Type in “Regedit” (without the quotes of course)

2 . Go to the key:

HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WindowsNT\ CurrentVersion\WPAEvents\OOBETimer

and doubleclick on it.If you have OOBETimer then skip a,b,c steps.If you do not have OOBETimer the folloe the given steps:-

a.Right click on the right side of “WGAEvents” and select New > Binary Value
b.Rename it to “OOBETimer” and go to step 3.

3.Then change some of the value data to anything else (delete some, add some letters,just change it!Now close out Regedit)
.
4 . Go to Start > Run > “%systemroot%\system32\oobe\msoobe.exe /a” (again, don’t type the quotes)

5. The activation screen will come up,and then follow the following steps

a.Click on “Yes,I want to telephone customer service…” and select “Next”

b.Then do not enter anything into the next box.Just press “Change Product Key”

c.Then type in the product Key”JG28K-H9Q7X-BH6W4-3PDCQ-6XBFJ” into the box and click “Update”

d.Ignore rest of it and close the box

the system boots with no problem, but crashes or freezes when certain applications are run

It may seem as if the application is corrupt,but try a diagnostic such as AMIDIAG from AMI or Tufftest from windsor technologies
WWW.TUFFTEST.COM

Run repetive test on the cpu.While cpu run in real mode, diagnostics can detect errors running protected mode instrustions and perform through register checking.AMIDIAG stands out here because of the very specific error codes that are returned.Not only will tell you if the CPU checks bad, but it will also tell you the specific reason why.
  When an error code is returned suggesting a CPU fault, try another CPU.If a CPU fault is not detected, expand the diagnostic to test other portions of the motherboard.If the entire system checks properly, you may indeed have a corrupt file in your application.

The system boots with no problem, but crashes or freezes after several minutes of operation, the system BIOS mis-identifiers the proccessor, An older system refushes to run properly when the cpu's internal, the p4 or Athlon XP speed is reported incorrectly...more wait for that

hard disk controller failure solution for free

this maybereported as an "HDC ERROR". There is a problem with the hard drive system or either the hard drive or drive controller has failed.Check the drive controller first, and make sure it's seated properly in its bus slot.Try a different bus slot.Check that all the drive cables are secure.Make sure that the hard drive is spinning up.Try a new drive controller, and try a different hard drive if neccessary.If the hard drive controller is integrated on to the motherboard, you may need to replace the motherboard outright.

there is no power indicator and you cannot hear any cooling fan

chances are that there is insufficient power to the computer. Use a Voltmeter and confirm that there is adequate AC voltage at the wall outlet.Check the AC cord next to make sure it isn't loose or disconnected. See that the master power switch at the power supply is turned on and connected properly.Check the power supply fuse.The main fuse may have opened.Replace any failed fuse.If the trouble continues,try another power supply.In many cases, a poor quality power supply will allow voltage transients to pass through and damage the motherboard (preventing and any system activity)-- though this rarely damages the CPU or RAM.If a new power supply doesn't correct the trouble, replace the motherboard if necessary...

Any doubt comment here 

Computer Peripherals

Plan


Printers
Scanners
Keyboards
Pointing Devices



Printers

Four main types:
Dot matrix
Laser
Ink jet
Thermal dye transfer and thermal wax transfer

Impact vs. Non-Impact



Impact printers physically transfer a dot or shape to the paper
Of those in the preceding slide, only dot-matrix uses impact printing
Non-impact printers spray or lay down the image with impact
Impact printers remain important because they can print multi-part forms


HOW IT WORKS


A print-head moves back-and-forth in front of forms (paper) on which characters or graphic images are transferred.  The print-head contains numerous wires, typically from 9 to 24.  Each wire is part of a solenoid-like unit.  A pulse applied to the solenoid creates a magnetic field which forces the wire to move briefly forward then backward.  As the wire moves forward, it presses against a print ribbon containing ink.  The impact transfers an ink dot to the paper.  The paper is supported from behind by a platen.



Specifications



cps
characters per second
Varies by quality of print (e.g., draft vs. final)
lpm
lines per minute (related to cps)
Forms
Maximum number of layers of paper that can by printed simultaneously
Specified as n-part forms (e.g., 4-part forms)
mtbf
Mean time between failure (e.g., 6000 hours)

Noise

Dot matrix printers are notoriously noisy!
This is a major disadvantage in many environments





Uses



Primarily two:
Any situation that requires multi-part forms
Small printers, such as
Calculators
Adding machines
Point-of-sale terminals




LASER PRINTER



How it works



Four steps
1.A laser is fired in correspondence to the dots to be printed.  A spinning mirror causes the dots to be fanned out across the drum.  The drum rotates to the next line, usually 1000th or 1600th of an inch.

The drum is photosensitive.  As a result of the laser light, the drum becomes electrically charged wherever a dot is to be printed.



Operation of a Laser Printer



Four steps
1.A laser is fired in correspondence to the dots to be printed.  A spinning mirror causes the dots to be fanned out across the drum.  The drum rotates to the next line, usually 1000th or 1600th of an inch.

The drum is photosensitive.  As a result of the laser light, the drum becomes electrically charged wherever a dot is to be printed.



Operation of a Laser Printer

2. As the drum continues to rotate, the charged part of the drum passes through a tank of black powder called toner.  Toner sticks to the drum wherever the charge is present.  Thus, the pattern of toner on the drum matches the image.



3. A sheet of paper is fed toward the drum.  A charge wire coats the paper with electrical charges.  When the paper contacts the drum, it picks up the toner from the drum



4. As the paper rolls from the drum, it passes over a heat and pressure area known as the fusing system.  The fusing system melts the toner to the paper.  The printed page then exits the printer.

As the same time, the surface of the drum passes over another wire, called a corona wire.  This wire resets the charge on the drum, to ready it for the next page.

Specifications

ppm
Pages per minute
Typically 4-10 ppm
dpi
Dots per inch
Typically 600-1200 dpi



Background



Inkjet technology was developed in the 1960s
First commercialized by IBM in 1976 with the 6640 printer
Cannon and Hewlett Packard developed similar technology
Also called bubble jet

 
 
 

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