The modern viruses are getting smarter these days, they can enter your computer system without the user even running an executable file or downloading some content from the internet. Once entered a machine, the virus can prevent the user from running antivirus scans or installing new antivirus. It can also disable antivirus programs or prevent antivirus programs from downloading updates. Now if you are even aware that the computer is infected, the virus removal becomes very difficult. In olden days, the only way was to backup the important data and reformat the system. But it is not the same today, as we have online virus scanners available today.
The online scanners can detect hidden infections or prevent one from occurring. Online virus scanners also scan downloaded files for safety before opening or running them. Online virus scanners are a valuable resource whether you want to remove a virus from a file, or you just want to run a routine check to make sure a virus hasn’t slipped into your system. These days many online tools are available on the internet to scan virus infected files. They are very easy to use. Many of them are absolutely free also. But you should know that which of these online tools can be trusted to help you secure your computer system. To help you in this regard, some of the most trusted online virus scan tools are briefly explained here. Just take a short look.
1, Free BitDefender online scanner:
The BitDefender is a fast, free, browser accessible online virus and spyware scanner integrated with BitDefender’s award-winning virus scanning engines. It automatically scans the system memory along with all files, and drive’ boot sectors without slowing down the system. Bitdefender Quickscan runs as a super fast virus and spyware detection tool, offering an option for the traditional time consuming virus scanners. It can be accessed from any PC connected to Internet. It can also be installed as a widget or browser extension on the computer.
However, it only detects spyware and viruses that are present in files which run at system startup or active in memory. It does not scan inactive malware. It also doesn’t remove the detected malware.
2, Trend Micro’s HouseCall:
Trend Micro’s HouseCall can quickly detect and repair many malware threats including spyware, viruses, trojans, worms, unwanted browser plugins and much more. It is browser independent, which means that it can be used on any of the internet browsers. It has three scan options including quick scan, full scan and custom scan. A quick scan reduces the scan time greatly since it only scans the most critical and most commonly infected areas of the system.
The Trend Micro’s HouseCall requires at least 300MHz IntelTM PentiumTM processor or equivalent processor to work. It also needs at least 256 MB of memory and at least 200 MB of vacant disk space. It runs on Windows XP (32-bit) Home or Professional with SP2 or SP3, Windows Vista (32-bit, 64-bit) Ultimate, Business, Home Premium, or Home Basic with SP1 or SP2 and Windows 7 (32-bit, 64-bit). The system on which the HouseCall runs must have at least 16 bits of colors with a minimum resolution of 1024×768 pixels.
3, ESET Free online virus scanner:
ESET Free online virus scanner detects and eliminates both known and unknown forms of malware like viruses, trojans, worms, spyware and phishing software. It also includes an anti-stealth technology by ESET to help prevent malware for hiding from ESET’s powerful scanner. It moves the infected files into quarantine automatically where it allows the user decide what to do with the infected files. The users can restore the infected files or delete them permanently. It is a fast and easy to use online scanner, which is always up to date.
The ESET scanner requires an i386 (Intel 80386), amd64 (x86-64) or equivalent processor. It runs on Windows 7/Vista/XP/2000/NT (32/64-bit) operating system. It requires a Microsoft Internet Explorer 6 (or later with ActiveX turned on), Opera, Chrome, Firefox, Netscape, Safari and other web browsers. It also needs at least 32 MB of memory in which there must be at least 15 MB to 30 MB of vacant disk space. If you want to use ESET scanner on your PC, then you must have administrator rights on the system.
4, Panda Active Scan:
Panda Active Scan is a free online antivirus tool that detects and eliminates over 90,000 types of viruses and Trojan horses. It can be accessed from a web site, but cannot be downloaded on the computer. It utilizes Microsoft ActiveX technology and works within the web browser. It is updated at least once in a day, and can also scan compressed files and e-mails. Its amazing system detects even some unknown malware. You need to install its ActiveX controls, if you have not used it before.
5, F-Secure Free Online Virus Scanner:
Many times we do not have to scan the whole system, but we want to scan a single file for viruses. In such case, we can make use of the free online Individual file scanners. These online tools are a great resource to scan these files.
Some of the trusted free online Individual file scanners are listed here.
VirusTotal.com lets uploading a file and it automatically scans it using virus signatures and antivirus definitions from above 40 diverse antimalware and antivirus software. It also allows you to submit the URL of a website and it will scan the site for viruses and malware with almost 20 various antivirus programs. It uses more than 30 virus scanners to scan a file. It allows a maximum file size of up to 32MB. It provides a reporting feature that allows searching for previous reports of submitted files.
2, Kaspersky Online File Scanner:
The Kaspersky free online individual file scanner scans files using effective and powerful antivirus scanner of Kaspersky. However, it allows scanning files with a file size not more than 1MB. Multiple files can be zipped as one and scanned within the 1MB size limit. It supports only the Windows operating system.
3, ThreatExpert Online File Scanner:
It is also a free online individual file scanner. The size of the file to be uploaded for scanning must not exceed 5MB. The innovative system of ThreatExpert provides a quick, detailed description and analysis of the behavioral effects and changes that a malware makes to the operating system upon infection. System administrators can use this information to reduce the impact of a virus on a computer system.
4, Jotti’s Malware Scan:
Jotti’s Malware Scan lets the user to upload a file and get it scanned by 20 well-known antivirus scanners immediately. It is a truly valuable resource to quickly scan a file. There is a 25MB size limit on files. With scanning the file, it also shows detailed information (the type and size of file with the SHA1 and MD5 details) about the uploaded file. It provides a permalink that has all the information with the scan results. In case the user forgets to store the permalink, he/she can relocate the scan page of the file using the Hash search feature of the site and MD5 information of the file.
VirScan.org is a free online file scanner, which scans files up to 20MB of size and archives up to 20 files, for viruses. It uses above 30 trusted and famous virus signatures and antivirus programs to check infected or suspicious files.