What is the main reason behind getting system slower while browsing internet or opening any program?

Sunday, August 23, 2009

When we use internet or any programs like word, excel or any other programs. Then some of the file are store in cache memory and temporary folder. These store lots of file which is not necessary for us at all. So we have to delete these file frequently because these file make cause to load computer slower while we open or restart computer. For internet as well we need to delete files from the internet explorer which is located in

Internet explorer => tools => Internet options => Click on Delete cookies , Click on Delete files and Click on clear history

Note : When we delete all file some of web address store in offline folder are also deleted and those files which are stored in cache memory is also deleted. So use as per your requirement. You can only delete cookies only or files or clear history.

E.g.:

Role of System Recovery while scanning virus

Wednesday, August 5, 2009

If we find any viruses in our system we have to change some setting of our computers before scanning our system otherwise when we start scanning without this setting it might be possible that viruses and worms might not completely be removed because sometime in some anti-viruses when threats are detected and try to remove it. It takes backup of that file and store it in its folder. But the usual case of having this problem will be with the System Recovery because it will backup this files most of the time. Most the anti- virus warns about this information. But if it does not then we have to disable System restore before scanning our infected system.

Hacker may send pop up message which slows down our system

Hackers enjoy taunting their victim by sending lots of pop up messages and making the system slowdown. Sometime hacker even send the e-mail from our other private e-mail address to our local e-mail address. So if we receive those e-mail then we can say that incident has already occur. In some cases hacker sends message like “I know your IP address”. If these kind of message are received then it is an incident which has been occured by some hackers.

When we are downloading any free software from the web it might contain some hidden files in it which may be viruses. so be aware of those free download site and put our anti-virus up to date which will detect virus instantly and delete or disable download.

Procedure to remove Ravmon.exe virus and it's nature

Tuesday, August 4, 2009

When system is infected with Ravmon.exe virus then if we go to the my computer and right click on any drive then small pop up window opens which include explore, search, copy, paste, properties etc. Their it must show open as well but due to infected with Ravmon.exe it does not show open list and pop up windows also shows list in different language such as chinese.

This is due to infection of Ravmon.exe.

If we want to remove this virus we can use nod32 anti-virus so that it removes this virus completely because there is link of another file as well which is Autorun.inf. Some anti-viruses does not delete this autorun.inf while nod32 delete both of them. the outcome from other anti-virus will be like, it delete Ravmon.exe but doesnot delete Autorun.inf so when we scan with other anti-virus it does not show any viruses but if we right click on any drive same thing as above like open does not show.

For this reason if we want to completely delete it we have to do it manually like this

=> Click on start menu

=> Clik on Run

=> type CMD then Press enter

=> It opens new dos prompt window

=> Type ATTRIB -H -R -S AUTORUN.INF then press enter

=>Type del autorun.inf then press enter

Now the virus is completely removed and your right click on drive will show open list and won't show chinese language as well.

Uses of Internet

Thursday, July 30, 2009

Internet can be used for many purposes. Now in 21st century nobody can imagine without internet. It is most widely used in banking, government offices, Security agencies, private offices, homes almost every where now internet is required. nowadays it is used for net banking, chatting audio and video, advertising etc. although it has lots of advantages, it has drawback as well. sometime hacker try to hack our system via internet and steal our private and confidential information. some hacker even try to corrupt our system by sending different kinds of malware such as viruses, Trojan horse, worms.

we can find information about almost everything in the net. now internet speed has improve significantly. No matter whether it's kids or old or young, internet is used by everybody. As the internet users are growing day by day universities and campuses has introduced online education system. Because of this people now have lots time which can be used in other works. we can also share file with our friends and families. file may include pictures, videos or some other documents as well.

Trojan horses carry viruses or worms

Wednesday, July 29, 2009

Trojan horses can carry viruses or worms because they can have a payload that installs a back door or trap door component in a computer which allows attacker to access computer when they needed. Trojan horses are medium threats to computers. when computers are infected with Trojan horse then that computer became very slow because behind the system that Trojan horse do huge amount of work such as searching important information, stealing information from the system an so on.

The most common types of Malware and difference between worms and viruses

The most common type of malware are viruses, worms, Trojan horse, logic bombs, and back doors. Worm is a malicious program which do not require another program for replication. It can replicate themselves as long as the memory, hard disk space and network bandwidth is available. If our system is infected with worm then every website we visit are also affected by it because it places working copies of worm on their servers.
Whereas viruses itself cannot do anything it needs application program to transmit the virus from one machine to another. So it attaches itself to the program and take control of that programs to target computer. Then virus controlled computers starts to replicate itself to target other computers.

Buffer overflow attack and denial of service attack

Buffer overflow attack is application error when more data is sent to a buffer then it can handle. This time attacker will take the opportunity and attack the system by sending lots of request which leads to denial-of-service attack. Then the web page will no longer be available to users.
When denial-of-service attack occurs then every system connected to the internet which provide TCP based network services such as web server, FTP server are affected by it.

Internet and its Features

Monday, July 27, 2009

Today's world is the age of information technology age. today people do lots of work without spending lots of time and energy. They sit in home and complete lots of work such as do shopping, pay their phone bill, Rent etc online without going outside. For this they need internet and computer at their home.

well it has lots of advantage as well as it has disadvantages as well. when we use internet then sometime we are being hacked by other computer secretly, so we must have to install updated anti-virus and firewall to protect our computer. These are some security measures to be taken very seriously because sometime hacker may hack our computer and get very secret information such as our email user name and password, Bank account details and our personal photos etc.
so in order to protect from these hackers we need to install updated anti-viruses and firewall.

Some of the features we can get by internet are, we can shop our groceries online and delivered to our home. we can pay different bills such as grocery bill, phone bill, Internet Bank transfer etc.