How to enable USB drives , USB ports and USB Mass storage devices ?

This post answers the below questions. If you want answers for these you are in the correct place. Else please leave a comment to editor for more information.

1.How to Enable USB Mass storage devices in Windows XP PC within corporate Networks or Public PCs ?
2.How to enable USB drives ?
3. How to enable USB Flash drives or Portable hard disks or Pen drives?
4. How to install USB flash drives in Windows ?
5. How to enable USB registry ?
6. How to download UsbStor.inf for Windows XP?

[ Warning: You can get fired from your company if you are caught doing this or caught stealing information from your company . This information is just for essential usage.]

Now if you are someone looking for enabling USB Mass storage devices in your corporate Network or public PC , You need to have access to your c:\Windows\System32\inf folder  or Your windows driver folder.

You also need USBStor.inf file in the folder or anywhere else in your PC. If you don’t have the file most likely your IS team would have deleted this file.

Download the file USBStor.inf  Download here

You can copy this file to your drivers folder C:\Windows\System32\Inf\ if you want others using PC to install USB mass storage devices or keep in your folders just for you alone.

If you don’t want copy to drivers folder your USB Mass storage devices wont be installed automatically, You will need to go to Device Manager and select device (the device with exclamation) And click update driver and point to the USBStor.inf file.

And you also need to change a registry entry to enable to USB Mass Storage devices – How to enable USB registry entry? 

Change value of the below key to 3 to enable USB Mass Storage device, if it already
3 no need to change this value. If your USB Mass storage device is not working even after installation using driver this will be the culprit, companies set this value to 4 to block the USB Mass storage devices.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UsbStor

When you do this, the USB storage device is detected and works automatically if it is installed already.
To set the Start value, follow these steps:

1. Click Start, and then click Run.

2. In the Open box, type regedit, and then click OK.

3. Locate and then click the following registry key:
4. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UsbStor

5. In the details pane, double-click Start.

6. In the Value data box, type 3, click Hexadecimal (if it is not already selected), and then
7. click OK.

8. Exit Registry Editor.

But many companies wont keep the drivers under C:\Windows\System32\Inf\ folder
So you might need to go to Folder options in and enable * show hidden files as below

And then do a search for *.inf and find your driver folder. Companies with smart Infrastructure teams do this so users wont copy drivers directly.

How to block or Disable USB Flash drives in Windows XP

This Post talks answers the below queries.

1. How to block USB Mass storage – Flash memory drives , USB Flash Memory devices in Windows XP based PCs?

2. How to remove ability to install new USB Mass Storage devices ?

3. How to disable autorun feature of USB drives ?

Next post answers

3. How to enable Blocked USB mass storage devices or flash memory devices in corporate networks?

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Typically USB Mass storage devices like USB Flash drives or Pen Drives or similar devices (Sandisk,Transcend ,U3 Micro cruzer, Kingston ) and Portable Hard disk drives like Seagate,Western Digital etc or any USB mass storage device can be blocked in Windows XP PCs by editing registry and removing some driver files/making the files protected.

Step 1 : If the device is not installed already and you need to block any new installations
The access to following files can be restricted.

%SystemRoot%\Inf\Usbstor.pnf
%SystemRoot%\Inf\Usbstor.inf

Where %SystemRoot% is C:\Windows\System32\ Folder if windows is installed in C. Replace the drive letter based on installation.
Hence you should look for these files under


C:\Windows\System32\Inf\Usbstor.inf

This file has driver information about USB Mass storage devices. If this file is made restricted or deleted, users cant install new Flash drives or any USB hard drives. [This will not affect other USB devices like Mouse, keyboard etc]. When we say restricted make the file accessible only to administrators, if you are talking about kiosk, internet center PC just delete the Usbstor.inf file so no one can install it.

2. If your USB mass storage device is already installed then change the below registry entry value to 4. Its default value is 3 which is USB Mass storage devices enabled condition.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UsbStor

When you do this, the USB storage device does not work when the user connects the device to the computer.
To set the Start value, follow these steps:

1. Click Start, and then click Run.
2. In the Open box, type regedit, and then click OK.
3. Locate and then click the following registry key:
4. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UsbStor
5. In the details pane, double-click Start.
6. In the Value data box, type  4, click Hexadecimal (if it is not already selected), and then
7. click OK.
8. Exit Registry Editor.

Your USB Mass storage devices will not be detected if this value is changed. This will NOT affect Mouse,Keyboard or any other USB hardware.

Best Web browser ? – Google Chrome Review

My first impression of Google Chrome was not so good.The first time when I downloaded and started using it, felt very uncomfortable without the Google Toolbar. I got so used to using Google toolbar and my first thought was this browser is not for me at least for time being. So after a few hours I was back to Firefox and IE 7.

Google Chrome - Best browser ?
Google Chrome - Best browser ?

Few days went on and heard somewhere Chrome works better with google’s products like GMail and Youtube. So again I went back to Chrome and started using with Gmail and to my surprise, Gmail was very fast in Chrome and I decided to try it for a few more days.The other main factor which was refreshingly good was how fast the browser itself opens and in this Google Chrome seemed to beat Firefox and IE by a quite a margin. But this could be because the current version
of Chrome doesnt allow support addons or extensions and does not have a separate toolbar like Firefox or IE. Maybe this might or might not change in future versions.

Now coming back to Missing toolbar issue, after a few hours with Chrome, I started using the address bar of Chrome to search, jus like the way we type site addresses. Type any word and enter and your search results are there for you. Still Im missing the suggest(and Autofill) feature which is present in google toolbar, which will bring related
keywords and help you in searching.

 Google chrome Browsing history view

One more notable feature is the ‘ Browsing history view ‘ when you open Chrome, It brings up to nine most visited website thumbnails, and most of the time I use these thumbnails to navigate these websites. This is definitely a very useful addition. The incognito tab option, which is basically private browsing which would allow any tracking files(cookies) to be stored in your computer or wouldnt leave any browsing history / Search history in your computer. Chrome also maintains browsing history in a calendar fashion with thumbnails and allows to search the browsing history. The browsing history can be deleted by day or completely.

Though Chrome doesnt have many new features now it has replaced Firefox in my laptop as the primary browser, I still use IE for what I used it for even before I got Google chrome. Nowadays I mostly dont use Firefox, this could be because firefox isnt faster or lighter anyomore and Chrome offers what I need. I believe Chrome will definitely eat into Firefox’s market.

On the negative side FTP downloads doesnt work in Chrome and even some other sites which use Flash also work differently in Chrome. Hopefully this will change with the newer versions of Chrome, afterall Chrome is a newbie in Browser market. If you go sheer speed of Browsing and JavaScript rendering Google Chrome seems to be the best browser in market.

Download chrome – http://www.google.com/chrome

Download Chrome Beta (New version with more features) – http://www.google.com/intl/en/landing/chrome/beta/

Google Chrome Blog – http://chrome.blogspot.com/

Google Chrome’s Features – http://www.google.com/chrome/intl/en/features.html

[PS: I recently downloaded IE 8 and quite impressed with it, Not like Chrome but still will come out with its review soon]