Archive for the ‘Protection Against Viruses from USB in 3 steps’ Category

Protection Against Viruses from USB in 3 steps


 

Hello Friends,
Viruses attack through USB is a very common problem….
Today i m gonna tell you 3steps to protect your PC from Viruses incoming from Your USB drive also how you can del those viruses from USB….
here i will cover these 3 steps>
1. Disable AutoRun Functionality
2. Manually deletion of viruses through USB drive
3. Scan USB using Antivirus
**Never Open any USB without checking for Viruses using the step 2 and 3.
Detailed description of these steps>>>>

1. How to Disable Autorun Factionality:
well, i guess all of you know, what is autorun…. so i just step forward to tell you how to disable it.

Group Policy settings to disable all Autorun features in Windows

  1. Click Start, click Run, type Gpedit.msc in the Open box, and then click OK.
  2. Under Computer Configuration, expand Administrative Templates, and then click on System.
  3. In the right side you will see Turn off Autoplay,right click on it and then go to Properties.
  4. Click Enabled, and then select All drives in the Turn off Autoplay box to disable Autorun on all drives.
  5. Click OK to close the Turn off Autoplay Properties dialog box.
  6. Restart the computer.

Edit Registry to disable all Autorun features in Windows

  1. Click Start, click Run, type regedit in the Open box, and then click OK.
  2. Locate and then click the following entry in the registry:
    HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\NoDriveTypeAutorun
  3. Right-click NoDriveTypeAutoRun, and then click Modify.
  4. In the Value data box, type 0xFF to disable all types of drives. Or, to selectively disable specific drives, use a different value as described in the “How to selectively disable specific Autorun features” section.
  5. Click OK, and then exit Registry Editor.
  6. Restart the computer.
2. Manually deletion of viruses through USB drive:
In this step you will learn, how to manually check USB for viruses using Command prompt and how to delete them……
First, i m gonna tell you how to check USB for viruses>
  1. Click Start, click Run, type cmd , and then click OK.
  2. Now go to my comuter to check, what drive location is assigned to USB from A: ,B: ,C: ,D: ,…etc….
  3. Type that location in Command prompt and press enter.
            For Example…..   if USB drive location is F:
            then type F:
            as result you will got something like this F:/>
    4. Now check all the files and directries in USB. for this:
  •  Type Attrib and press enter….. By this you will get list of all the files
  • and to see directries type dir  and press enter…………..
        Check the list throughly for any virus….
            Now the question arrises which file could be a virus. how you can know about that????? 
  • Well, for this you should know names of files and directories that you have copied in USB.
  • Any suspecious file that you did’t copy, can be a virus as viruses copy automatically with other filles.
  • Mainly Suspeuscious files having extension  .exe or .inf  and suspeciouse Directories with some Bad names or a very Attractive name….. can be virus .
  • Suspecious file with extension .exe and attributes SHR,  could be definitely a Virus.
Secondly, I will tell you how to delete these Suspecious Files from USB>

5. Continuing after step 4,  Type suspecious file name followed by del and Press enter.

                 For Example> if i want to del autorun.inf, then i will write like this
                                  F:/>del autorun.inf
    6. If any suspecious file have attrib SHR or SH…… then it will not delete directly. For deleting these files first you have to remove their attrib…
                   To remove SHR attrib type> attrib -r -h -s filename
                   To remove SH attrib type> attrib -h -s filename
after removing their attributes, delete these files also.
3. Scan USB using Antivirus
At last Don’t Forget to scan your USB drive using a good and Updated Antivirus.
4. Step Four………… Nooo no, No more steps, You can open your USB drive……your PC is safe now.
Tested on: Windows XP
Be Safe

 

If you want more information and tutorials about Antivirus and Security, check out other posts under category Antivirus and Security Tips.