General Queries

What is a virus?

Virus is a malicious piece of software or code, which is written intentionally for the destruction of data or malfunctioning on computers. It doesn't have its own entity. It has two prominent features i.e. execution and replication.

What is a worm?

A computer WORM is a self-contained program or set of programs that is able to spread itself to other computer systems (usually via network connections). Worms unlike viruses don't patch themselves to the executables files. They work independently.

What is a Trojan Horse?

A Trojan Horse is a fake file that pretends to do something desirable but on execution it infects the system. It does malicious activity without the user's knowledge.

What is a Backdoor?

Backdoor is an independent program. It has two components i.e. Server and Remote. Server component is installed on the victim system and remote component is the tool to control the victim system remotely. This is basically used for the hacking.

What is Adware and Joke (Prank) files?


A program that secretly gather personal information through the Internet and relay it back to another computer, generally for advertising purpose. This is often accomplished by tracking information related to Internet browser usage or habits.

Joke (Prank):

A program that change or interrupt the normal behavior of your computer, creating a general distraction or nuisance.

Why Trojan, Worm and Backdoor files are not repaired?

As they have their own independent programs which replicates it infection from computer to computer unlike viruses that replicates from file to file. They don't patch to executables or any other files. Hence deletion of their files cure the system.

What is denial of service (DOS) attack?

A Denial of Service (DOS) attack is a method that hackers use to prevent or deny legitimate users access to a computer. DOS attacks are executed using DOS tools like TFN, TFN2K etc. These tools send many request packets to a targeted Internet server (usually Web, FTP, or Mail server), that floods the server's resources, making the system unusable.

What are rootkits?

Rootkit refers to maliciously modified set of administrative tools that grants administrator access to the intruder thus giving them full control of the system. Rootkits typically hides files, processes, network connections, blocks of memory, or registry entries from other programs used by system administrators to detect specially privileged accesses to computer system resources.

What are packers? Why are certain packers dangerous?

Packers are tools that pack multiple files together. It can also be used to compress a single file. This is done to reduce the file size. Packers have an inbuilt functionality of packing and unpacking and hence do not need a third party application for the same. Packers are now being used to spread malware by packing a malicious file along with a set of non-malicious files. There are three types of packers:

  • Black Listed Packers: All highly suspicious packers belong to this category.
  • Gray Listed Packers: These packers may, or may not be suspicious.
  • White Listed Packers: All safe packers belong to this category.
What is a false positive?

If virus is detected in a clean file it is referred to as false positive.

Can I use more than one anti-virus software on my computer?

Running more than one anti-virus on your computer is not recommended unless specified specifically by the vendors. Anti-Virus product has some modules like real time scanning of files and real time scanning of mails, which seemingly integrates with OS to provide such services. Such integration can cause problems if there are multiple such services being installed and doing the same task. This way technical issue may arise as such modules are not designed with keeping such things in mind. Technical issues may cause your system to freeze repeatedly which may lead to data loss or unstable system etc.

Why do you recommend to not use full share access features on computer?

Allotting full share access rights to drives and folders could be dangerous for data, system & entire network. Virus threats increase if a full sharing rights is assigned to folders or drives. Currently new viruses tend to replicate immediately if they find share level access on computers. Avoid using full sharing on your computer but in case if data has to be shared in network then sharing rights should be assigned READ ONLY or PASSWORD PROTECTED.

Steps to share/unshare your folder & drive:

  • Double-click My Computer on the Windows's desktop.
  • Right-click on drive or folder to be shared, click on sharing tab.
  • Look at sharing status:
  • If not shared is checked Press OK.
  • If shared as is checked, we recommend that you disable this option by checking Not Shared.
  • If you have to share this volume, then under Access Type check either Read-Only or Depends on Password.
  • You can create separate passwords for read-only and full access. Give the Full Access Password only to those who need it.
  • For all other shared files and folders, make sure Access Type is set appropriately
How to disable System Restore feature on WINME/XP?

Disable System Restore under Windows Me:

Point to Start, Settings, and Control Panel. Double-click 'System', then click on the 'Performance' tab. Click 'File System' then click the 'Troubleshooting' tab. Select 'Disable System Restore' and click 'Apply'. Restart your system.

Disable System Restore under Windows XP:

Point to Start, Control Panel, Performance and Maintenance. Double-click "System", then select the System Restore tab. Select the 'Turn off System Restore" on all drives box. Click Apply. Click Yes. Restart your system.

What is Quick Heal? What platforms does it run on?

Quick Heal is anti-virus software that provides reliable and constant virus protection in a single, fully integrated product to the computers. It can be installed on Windows NT/2000/XP/2003; Windows 95/98/Me; DOS/Windows 3.1x and NetWare computers. It provides both on-access and on-demand scanning.

Does Quick Heal detect all in the wild viruses?

Yes, Quick Heal does detect and repair all in the wild viruses.

Where can I find latest Quick Heal and manual?

Quick Heal software and manual can be obtained from

Latest software and manual are also available in CD for nominal charges. Please contact nearby reseller of Quick Heal for latest CD or contact:

International Support Centre

Company  : Quick Heal Technologies (P) Ltd.
Address : Office No. 101, Shree Sai Narayan Apartment,
Ganjave Chowk, Navi Peth,
Opposite Patrakar Bhavan, LBS Road
City : Pune
Pincode : 411030
State : Maharashtra
Country : India
Email :
Website :
Where can I find technical details about viruses on Quick Heal website?

Technical details of latest viruses can be obtained from

Where do I get Quick Heal in my country?

Please visit this link

Quick Heal box pack is available in selected countries (countries list given in the above link). If your country/city is not in the list then you have to either buy online using credit card or sending payment by cheque to us at the following address:

Company  : Quick Heal Technologies (P) Ltd.
Address : 603 Mayfair Towers II,
Wakdewadi, Shivajinagar.
City : Pune
Pincode : 411005
State : Maharashtra
Country : India
Phone : +91-020-41060400/66025985
Fax : +91-020-41060401
Email :
Website :

We will send you the "Serial Number" immediately after we receive the payment. This way you will be entitled to get copy of Quick Heal in electronic Media (Download from our website) and also entitled to get free upgrades, technical support, information and solution to all new viruses free.

Why Quick Heal requires Microsoft Service Pack to be installed on the system?

Microsoft recommends the latest service pack use to fix the different bugs or vulnerabilities in its Operating System. This recommendation applies to both customers as well as developers who are working in Windows environment. Hence the products are being developed by following Microsoft recommendations. If any system which do not have the latest service packs or appropriate patches installed may trouble while using any application.

Quick Heal has always been developed by following Microsoft recommendation. Hence to use Quick Heal your system should have appropriate service pack installed to get the maximum benefits.

How long can I use Quick Heal evaluation copy?

Quick Heal evaluation copy can be used for 30 days from the installation date. In the evaluation period Quick Heal can also be updated two times.

Can I purchase Quick Heal using my credit card?

Yes, you can purchase Quick Heal by using your credit card. Please visit and click on "Buy now" to proceed with online purchase.

I do not have credit card how can I purchase Quick Heal?

If you are not having credit card or don't want to use credit card then you can send your payment by cheque to us. The cheque must be drawn in the name of "Quick Heal Technologies (P) Ltd."

Cheque should be sent to the following address:

Company  : Quick Heal Technologies (P) Ltd.
Address : 603 Mayfair Towers II,
Wakdewadi, Shivajinagar.
City : Pune
Pincode : 411005
State : Maharashtra
Country : India
Phone : +91-020-41060400/66025985
Fax : +91-020-41060401
Email :
Website :

We will send you the Serial Number immediately after we receive the payment. This way you will be entitled to get copy of Quick Heal in electronic Media (Download from our website) and also entitled to get free upgrades, technical support information and solution to all new viruses free.

Do I require a Serial Number / Product key to fully evaluate Quick Heal?

No. Serial Number / Product key is not required for evaluating Quick Heal.

How to verify if my system is victim of new worms, trojan, and backdoor?

Quick Heal System Information is an essential tool to gather critical information of a Windows based system to detect new malwares. This tool gathers information to detect new Malwares from Running processes, Registry, System files like Config.Sys, Autoexec.bat etc.

Submitting System Information file

This tool generates an INFO.QHC file at C:\ and sends the same using default e-mail client to Quick Heal research lab. If there is no default e-mail client, INFO.QHC file will be created at C:\ and you will be asked to send the same at the above mentioned e-mail address, for analyzing the problem of your system.

INFO.QHC file contains information in text and binary format. It contains critical system details and installed Quick Heal Total Security version details. Information contains automatic execution of files (through Registry, Autoexec.bat, System.ini and Win.ini) and Running processes along with their supported library details. It also collects files those are quarantined by Quick Heal from "Quick Heal Quarantine" folder. These details are used to analyze the system for new Malwares and proper functioning of Quick Heal Total Security. The above information is used to provide better and adequate services to customers. This tool doesn't collect any other personally identifiable information, passwords etc. We respect your privacy; rest assured this information will not be shared or disclosed.

Generating System Information

To generate system information follow the below given steps:

  • 1. Start Quick Heal or Total Security.
  • Click on Tools from the left pane.
  • Click on System Information.
  • Select the system information generating reason. If you are suspecting new Malwares in your system then select I suspect my system is infected by new Malwares or if you are facing problem while using Quick Heal Total Security then select I am having problem while using Quick Heal Total Security. Click Finish.
  • System Information (INFO.QHC) will be generated and sent to Quick Heal Technical Support by using default e-mail client settings, or you shall be manually prompted to do so.

The system information will be analyzed by our lab technicians and reverted to you in case if any samples requires to be collected from your system.

Does Quick Heal detect corrupt worms?

Yes, the Quick Heal scan engine has been designed to detect corrupt worms, and all types of known and unknown malware and viruses.

How do I submit a virus?

Submit a suspected virus to Quick Heal Support. Submit virus in password protected compress file for the safety reason and write down the password in mail

For technical support where should I contact?