Showing posts with label USB Ports. Show all posts
Showing posts with label USB Ports. Show all posts

Monday, August 26, 2013

Blocking and unblocking USB Ports

If you think that USB flash/pen drives are infecting your system with virus, then try to block all USB ports so that your system will not accept any USB flash/pen drives.

To do this
Type “REGEDIT” in RUN command window or if you are using latest Windows operating system you can type in Start up menu down run bar.
Then it opens system registry.

Now browse the Registry like this;
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTOR

Now Click mouse in the right side pane and double click on the registry key START and change the DWORD value as 4.

Now you can restart your computer to get effect of the changes in registry. Your USB devices are not accessible because your system USB ports are blocked.

By default DWORD value is 3.

To make your USB ports accessible do the same steps and change the value back to 3 (default value).

And restart your computer to check the effects.


Using BIOS
You can block USB ports even from BIOS setup itself.
This is very safe and effective.
To do this:

Start your computer and press ESC, F6, F8, F12 as mentioned in user manual to enter in BIOS Setup.
Once you enter in to BIOS Setup
Select “Advanced Options”
And check for the “External USB Ports” option DISABLE/ENABLE will be available.
Just change the option to DISABLE by using  + or – keys from your key board.
Restart your computer and check it.
Again when ever you want use USB Ports then goto BIOS Setup “Advanced Options” Change the “External USB Ports” option to default EANBLE by using  + or – keys from your key board.