tell if my computer has a virus?

So the question is typical but I think I can try to answer it.

If a computer has a virus it may start malfunctioning, like, it will not start. If we open a folder the same name appears with an exe [eg:- If i have a folder name -- Data, the virus will make a file called data.exe that too hidden.]

The virus doesn't allow to detect by antivirus and hence comparatively slows our computer.

For its safety always use a excellent antivirus and update it regularly.

Your computer might be at risk if you observe the annoying popup, which will just appear once per day, it has weaker protection than validated antivirus software.

3 things to do:
*Install anti-virus software (AVG, Norton, Mc Afee etc..)or update your current software;
*Install a firewall;
*Update your version of Windows.

How to make a computer faster: 6 ways to speed up your PC

1. Remove spyware, and help protect your computer from viruses
2. Free up disk space
3. Speed up access to data
4. Detect and repair disk errors
5. Learn about ReadyBoost
6. Upgrade to Windows 7

if d cmputr is slow

Well, there are certain things from which you can say if there is virus in your computer or not.

If your system is working slower than the normal then it can contain virus.

If your Internet speed has been decreased then also it can happen due to virus.

If some of functions are unavailable from your operating system then it also mean you having virus on your system.

If you not having any problem in your computer, even then you can have virus on it, just use antivirus and scan it, it no virus found, you are safe ;)

If the computer has virus, your OS become slower and hanging. Better to use Anti-virus for your computer.

Computer working slowly , hanging many times or shut down automatically means your computer has virus.
So, Install a good anti virus and update it regularly.

The first sign that there is a virus is that the computer becomes slower and begins to hang and switch off automatically and switch on again as Sasikanth pointed out.Later you see some files getting corrupted and also zig zags on the screen appearing as you are browsing..

If your system is infected with virus your system will start hanging and it automatically off and on.

Instal Avira antivirus programme  in your computer. Any signs of virus will be warned by this antivirus programme.

 

The operations might get slower and the system might stuck.

Slowness,loss of data,  random movement of mouse etc indicate presence of virus.

The best antivirus today is kaspersky antivirus. Which you can buy at very reasonable price. this antivirus update automatically and use less ram . And check your computer for viruses in background.....

I am using it and my computer is virus free.

Sumit,

In general different virus attack different parts and your Pc but quiet often some common problem faced are :

The improper operation of programs or slow performance of programs, unusual behaviour like shutting down without your intervention and exisiting of some .exe files not created by you etc..Other than this some viruses also stop your anti-virus software to work properly...or some important program which are needed to operate your system...

So both hardware and softwares can be effected so if you suspect any unusual beheaviour it is better to scan with anti-virus software which is updated regularly..

Hope this information helps you.
Regards