Problem with “Show Hidden Files & Folders” in windows Folder Option – WORM_AUTORUN.RW

I encountered a very tricky problem with hidden files and the option in the “Folder Option” menu in Windows. A virus spreaded from and external pen drive and ultimately slowed down the windows so much and at a certain point the windows wasn’t even starting and eventually I had to reinstall the Windows. But the problem wasn’t over even after reinstalling the windows. Another symptom was that when I double clicked on any of the Drives a new window opened everytime, and later on double clicking was’t working at all. I had to navigate through the browser. Later I had to follow a set of instruction to get rid of this problem:

PART: A (Removing the Virus/worm/trojan) 

1. Install AVG antivirus solution and update it.

2. I  had NC (Norton commander)a very old dos based explorer, . I opened NC from the command prompt, and through it I could browse through my drives and could see what damages the virus did. There was a file named u.bat  and also autorun.ini in all my drives. I deleted those. Then I made sure that the file named amvo.exe (C:\windows\system32\amvo.exe) was deleted (stop it from the taskbar if it is running in the process tree). Then I deleted almost all the files in the “system volume information” folder (restore point files). Remember, I used NC to do the above jobs as the files I mentioned above were in hidden format and wasn’t visible through normal explorer. But through NC you can browse and delete these.

The above method worked in my case, but cannot be guaranteed in all the cases.

PART: B (Fixing “Show Hidden Files & Folder” problem)

Go to the following registry key: (go to Start >> Run >> type “regedit” and then press “ok”)

DELETE the value CheckedValue in the right window. (Its type should be REG_SZ and data should be 2.)

Now create a new DWORD value called CheckedValue (same as above, except that the type is REG_DWORD). Modify the value data to 1 (0x00000001).

This should let you change the “Show Hidden Files and Folders” option now.

Be safe, be careful, use protections, ensure prevention and avoid cure hassles. 😉 😉


Search Engine Optimization (SEO)

All the websites developed carries a common goal- to be viewed by more visitors and more frequently. When there’s a new product in the market, a very intelligent marketing or publicity is required to attract the desired and potential clients. Same goes with websites. People have to know that you have a nicely designed rich website. Fortunately, the publicity for the websites are not going to cost you anything if you are smart enough to know how to do it.

Search engines are the places where every and almost all the internet users are likely to go through to get the relevant information they are looking for. And the proof of this is the giant Google. The success of google reflects how much people are dependent on search engines. Google is not the only one- YAHOO, MSN, ALTA VISTA and many others are also operating to serve people. Now if you ask “why they are doing so and what’s their benefit” – that will require another article to describe, so lets get back to track. Just think again how much efforts I’m giving in writing this article, and if no one gets through it, it will be totally worthless. That’s the point, I want people to know that I have written something. I need to do something which will allow the search engines to keep the records of the things in my site, and when people will search for relevant info, they will be directed to my article. Search engine will have many results and you will always desire that your article/link should be there in the beginning if not the in the TOP. Its not that by studying more hours than any other students in the class you can score most, you have to apply some technics and also maintain some basic guidelines to get a good score in the exam. Getting in the top in the search engine results also don’t really require any website to be rich in resources. As I mentioned, some technics- some algorithms or some configuration, are required. Now let’s talk something technical !

Wait… I had to attend a final exam this evening, and I am completely exhausted, I’ll be back with the same topic and resume from where I am stopping… In the mean time please go through what google has to say about SEO…

Be Right Back …..


In Bangladesh, the mobile phone companies emphasized mainly on voice service upto the end of 2005. Since then, the operators are introducing newer and modern technology to meet the data communication requirement of the clients. Other countries adopted those features long ago, specially the GPRS. GrameenPhone is the pioneer in introducing this type of data service to the people of Bangladesh. When GrameenPhone offered the service as a trial basis, Aktel announced the same sort of service… However, GP started staying a step ahead by offering EDGE where as Aktel started with GPRS. More over, after the trial period (to some selected users) GP’s service was available to both prepaid and postpaid customers. Aktel offered the service to both type of users recently prior to what the service was only available to the post paid users. Banglalink on the other hand offered GPRS to its postpaid Enterprise users from the beginning of 2007, depriving the prepaid and normal postpaid users. TeleTalk has offered reasonable packages for both prepaid and postpaid users. Infact teletalk is the only operator to offer unlimited usage package to the prepaid users also. Warid started its operation with the GPRS facilty, but yet to offer any unlimited usage package. Citycell, country’s only CDMA operator, has however started its data service after adopting CDMA 2000 1xRTT technology country wide. The data service technology by Citycell is known as EVDO (Evolution-Data Optimized). The service name is “My Citycell Zoom” and is only availble for the post paid users again depriving the prepaid users. Moreover, the package has flavor of both the time validation and data limit. This is not as cheap as the unlimited offers by the other operators nor as expensive as the Taka/MB offers.

Tariff plan for EDGE/GPRS/EVDO service:

General Packet Radio Services (GPRS) simply is an extension of the GSM standard to provide packet data services. It was introduced in late 2000. It can provide data rates from 56 to 114 Kbps and continuous connection to the Internet for mobile phone and computer users.

Enhanced Data rates for Global Evolution (EDGE) is a radio based high-speed mobile data standard. It allows data transmission speeds upto 384 kbps to be achieved when all eight timeslots are used. In fact, EDGE was formerly called GSM384. This means a maximum bit rate of 48 kbps per timeslot. Even higher speeds may be available in good radio conditions.

EVDO or Evolution Data Only/Evolution Data Optimized (often abbreviated as EVDO, EV-DO, EvDO, 1xEV-DO or 1xEvDO) provides fast wireless broadband (3G) internet service. EVDO is based on the 1xRTT standard, which is available in almost all cell phone coverage areas and provides Internet speeds of about 2-3 times that of dial-up (about 60K-100K).

A comparison between different Data Standards:

An advanced level article on this topic is available in the following link:


Multiple IP addresses in a single NIC!!!

I hope you have idea how Internet sharing works in WINDOWS… You have to have two different Network Interface Card (LAN card), one to get connected to the internet and the second one to share the internet to other network. In this way a single pc can connect to X numbers of networks with X numbers of NIC. In this way a pc can act as a bridge between two different networks. This seems so complex a process and also there are many more limitations. Moreover the routing between two different network is simply not possible in windows. But in Linux things are way different and way ahead. Slowly but surely i am getting the facts why people prefer LINUX. Some of you might laugh at me but I am really amazed to know that multiple IP addresses can be assigned in a single NIC. Yes I am talking about the range-x thing. I can provide a range of IP assigned to a single NIC. eg. starting from IPs to, doesn’t matter if my static IP was from another network( eg. If my static IP and rangex IPs are from different networks, then by just changing the gateways of static eth0 card to the IP of any of the rangex IP and also changing the gateways of the rangex IP to the main eth0 IP address, I can configure a simple router (routing between and networks). VLAN can also be implemented using this method. This is probably how the web hosting companies provide a range of dedicated IP addresses to the Client. Well I couldn’t write more details and the codes or configurations required for this as it would take the whole night for me to explain the whole procedure. But this is very interesting indeed. You can get some details from the following link:

Bind Multiple IP Addresses to a Single Network Interface Card (NIC) – by Tony Bhimani