If there is a trojan on my computer, can it go undetected by my Anti-Virus software?

I have KasperSky Anti-Virus.

Virus or Trojans have many variants and some security programmes are up to date and some or not. The software vendor will update the definitions every time when they find any new variants and if the database of you antivirus was not updated in a regular then your antivirus shields will not aware of the new variants.

That is why there is a need of updating the virus definitions and some free editions will not have the in-depth virus signature files and there will be alot of difference in the free version and full version of software's.

Because I observed many free antivirus programmes that do not have full feature they don't detect the antivirus and then I installed a Trojan Remover trial version which I was benefited from it alot it detected alot threats where in as antivirus cannot.

So I come to know that a full version of antivirus works better than free version and so I suggest you to install the full version of antivirus it's better and so many links are available on the Internet and they say that are full version but one thing you need to they don't have official support from the software provider.

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How does avast free compare to Kaspersky or Norton anti virus?

people say avast is the best but is it ?

I am using Avast free edition since 2 years, am observed that its not the best antivirus because  if a virus found on PC or USB drive just it says that threat detected but it never stops saying that again and again, here the same infected file and the same path shows several times. Repeating of the same file name and path in the alerts section but it not removes or cleans that particular file, just says blocked. This Avast free edition not finds the virus hosts file because it does not have the full features. If you buy the full version it does have all the features.

If a threat found in compressed file, this avast shows the threat detected and totally blocks that compressed file being it used or getting it extracted and here we cannot access other files and loss of work happens here

I checked with other free versions of antivirus like avg, avira and some more, faced the same problem and then I realised that it is better to have a full version and so I tried Norton by downloading the trial version and checked for 30 days it was very nice better than avast

So I purchased Symantec Norton 1 year license and using it since 3 months and getting the updates, offers aswell. I prefer Norton 360 for you, it's the best.

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Norton had a issue and now it removed itself from my laptop!?

OK so Norton had an error I don't remember it but I was told to download the removal tool it failed so now Norton is removed from my computer I really don't know what to do.... but before that I was working with HP support I restarted my computer but I cancelled the rebooting... :(

Actually I wanna know why you have downloaded the removal tool, If you want to uninstall you can go to control panel and remove it, but in this case no need of removal tool. May be you are using the trial version Norton Antivirus.

After downloading the tool may be the removal tool run in background so that Norton antivirus may be removed. You can check whether the Norton uninstalled or not, go to control panel, add/remove programmes and check the list if it is present there Norton not uninstalled fully and check the directories or folders where it is installed after if the Norton folders are present there the Norton antivirus present in your system partially.

After uninstalling if you restart your computer automatically, the directories, registry entries are removed from you PC. Better install a free antivirus like Avast, Avira...etc They provide good antivirus programmes.

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Last options for lap top infected?

Ok I have asked this several times but I can't seem to find the answer I got the FBI virus from visiting a website about the new movies that were coming it starts with iron man 3, man of steel a new wolverine, Spider-Man and Thor movie but the page was infected I got the virus and get rid of the page when it starts up but I don't know what to do? now the virus is still in the laptop. I read so many articles but none of them work it messed up my router meaning NO INTERNET I looked up bleeping computers, how to's, but nothing seems to work pls help if u think you know somebody who can help pls let them know I really need to get rid of this I have an Asus if that helps I'm thinking about factory restarting my computer I have a 2 year warranty on the thing and I know I'm at point were this is really serious and hard to work around but pls help I have been using my phone to get to yahoo

Your pc is infected with malware and spyware, better once just find a good malware, spyware remover. After installation backup your important files and then update the virus definitions and scan the whole computer. I turst Norton 360 and if you wanna know the performance of the software, you can try the trial version of the software. Install it and get 30 days trial, I assure you it will remove.

If you can afford buy the Norton 360 and if you cant try the avast antivirus 2013 free edition, this is also a one of the good security software where I trusted it. They provide one year license aswell.

After cleaning your system once check in add/remove programmes that whether any unwanted programmes installed in your PC, if you find any uninstall them.

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Windows error recovery message & programs take too long to open?

Two days ago my laptop unexpectedly shut off. Ever since then i get the windows error recovery message whenever i start up windows. I choose to start windows normally instead of going into safe mode. Once my desktop loads, i try clicking on programs that keep on failing to load. After 10 or more minutes i finally get them open. The screen also blacks out and comes back. The network icon sometimes shows that the computer is connected to the ethernet code when its not and it also shows that the internet is not connected or on when it is. The programs also become unresponsive alot , causing me to restart. What should I do ? I've been experiencing this problem for 2 days.

Your system might infected with malware or trojans or viruses. Once Install a good antivirus programme and scan the whole computer. While scanning it shows all the threats which were detected whlie scanning. Some antivirus programmes might delete the compresses files (rar,zip...etc) if the they found virus in the the compressed file, some deletes the total compressed file. Make sure to check with them, if you have any important data you may lose your data.

One more reason behind this is OS file system may be corrupted. If you have OS cd follow the steps to repair the windows. If you dont how to repair, contact the system administrator. Better install a good Internet Security sort of softwares. So many programmes available on the Internet and free versions also available. I found Avast free edition is good one in all these viruses which they provide for free.

If you found that Avast or any security programme is good one, buy the full version of software.

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Why does my Flash drive contents turns into shortcut?

I tried the full system scan after scanning the flash drive yet there is no threat found but every time I insert any flash drive into my laptop its contents turns into a shortcut....I wonder what could be the problem? I format my flash drive as well but it is still the same....

There is a virus either in you system or in flash drive, once check after formatting the flash drive again virus infecting the pen drive. This means after scanning you antivirus programmes is not cleaning or disinfecting the virus.

Which antivirus programme your are using? If you are using an antivirus free edition software's they might not detect the threats because they don't have full features enabled, They got so many limitations. These free edition programmes are provided by the company with limited features, it spreads as viral marketing. About 50% of users buys the full versions.

You need to check with your antivirus programme, because till now I am using the free edition software's  till now the best is AVAST Free Edition 2013. A good antivirus with all features (not the full version features

Once check with your antivirus programme, update the virus definitions scan the whole computer first. After cleaning your system clean the flash drive. If the antivirus which you are using free edition you need to uninstall it and reinstall, update the virus definitions or Install Avast free edition 2013 it's better detects threats clean them maximum possible.

If you can afford buy the full version of software's or try to scan the whole computer with Avast, If the problem persists you need to format the whole system, after installing OS install the Avast, but don't insert the flash drive after formatting. You need to have a USB tools like they remove some autorun virus or when you double click on the flash drive it executes the virus if there is a virus in flash drive.

If you are connected to Internet, Better install a Internet Security software....

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Is Avast free virus good enough to get rid of any kind of Virus and other for a Laptop?

After running Avast freeware I found no Virus on computer or anything. Seems like once a month though the computer acts up and I have to redo everything. Can a Virus or anything like that be in a computer but not on or in the hard drive? Can a Virus or whatever be in the Bios?

Avast free antivirus, has the limited features, which I have observed alot. In a situation the avast antivirus not detected any virus. After I uninstalled the Avast and Installed the Norton Antivirus Trial. Updated virus definitions, Scanned the whole computer and shocked by seeing the scanned results. It had detected about 150 infected files (tojans/viruses/rootkits). 

As there are many infected files, I am thinking that why Avast did not. I checked the features that which provided by the Avast and compared with Norton Antivirus features. It's totally different. We need to check the details and features of the programme before buying or downloading.

Avast can also detect all these infections. but you need to Buy the Full version. Check the picture below.

If you buy the Avast 7 Internet Security, It will detects the virus/trojans/rootkits. If you can afford you can buy

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