Protégez vous des menaces informatiques présentes partout dans le monde !
Restez à l’écart des sites / programmes malveillantes
Qu’est ce qu’un virus informatique ?
C’est un programme (ou autres) malveillant dont l’objectif principal est de perturber le bon fonctionnement d’un appareil ( souvent un ordinateur) . il se transmet et se propage d’appareil en appareil tel une maladie informatique.
Attention : Dans la mesure où le virus peut accéder à des données personnelles sensible, il peut poser un vrai problème de cybersécurité à prendre au sérieux, dans la sphère privée et professionnelle.
Comment se transmet un virus informatique ?
Pour se répandre, le virus informatique (ou malware) s’immisce au sein de programmes et de logiciels légitimes ou apparemment bénins. Cela lui permet de s’installer à l’insu de l’utilisateur. Il peut aussi se propager suite à : • une pièce jointe dans un e-mail • un téléchargement de logiciels ou de fichiers • depuis un support physique externe (clé usb, disque dur externe,…) • via un site web infecté • grâce à un clique effectué sur un lien malveillant • et bien plus encore … !
Quels sont les différents types de virus ?
• Virus du secteur d’amorçage
Il s’agit d’un virus qui peut prendre le contrôle de votre ordinateur lors de son démarrage, et endommager le système. Heureusement, c’est un virus relativement simple à éviter, puisqu’il se propage la plupart du temps par une clé USB infectée ou par la pièce jointe d’un e-mail.
Virus de script Web
Ce virus utilise le code de certains navigateurs et pages Web. Il peut infecter votre système si vous vous rendez sur la page d’un site Web malveillant, ou suite à l’ouverture de liens, d’images, de vidéos ou de publicités sur votre navigateur.
Browser hijacker
Pouvant être traduit par “pirate de navigateur”, ce virus détourne votre navigation en vous redirigeant vers des sites Web malveillants.
Virus résident
Ce type de virus s’installe dans votre RAM, la mémoire de votre système informatique, et entre en action à tout moment. Particulièrement sournois, il peut se cacher dans de nombreux endroits, et même dans les fichiers d’un antivirus.
Virus à action directe
Ce virus n’entre en action que lors de l’utilisation d’un fichier infecté. Du fait de sa présence ciblée sur un type de fichier, il est facile à éliminer.
Virus polymorphe
Le virus polymorphe est difficile à intercepter, du fait qu’il change de code à chaque exécution du fichier infecté. Il peut donc facilement passer dans les mailles de l’antivirus utilisé.
Virus infectant les fichiers
Ce type de virus infecte certains fichiers exécutables du système. Ils endommagent les fichiers systèmes et ralentissent les programmes.
Virus multipartite
Ce virus peut infecter votre système en différents points, se propageant dans l’intégralité du système suite à l’exécution d’actions non-autorisées sur le système d’exploitation.
Virus de macro
On retrouve principalement ces virus lors de l’ouverture de documents infectés, s’agissant la plupart du temps de pièces jointes d’e-mails malveillants.
Virus de réseaux
Ces virus se déplacent sur les connexions réseau et peuvent se répliquer grâce à des ressources partagées.
• Votre page d’accueil est différente (sans changements de votre part) • Il y’a beaucoup de pop-up (fenêtre contextuelle) qui apparaissent et vous dérangent • Envoie d’e-mail ou de commande non exécutée • Ralentissement conséquent sur la rapidité ou la performance de votre ordinateur • Activités inhabituelles • Présence de programmes inconnus • Et bien d’autres encore …
Quelles sont les manières de se protéger ?
Il est le plus souvent possible de supprimer un virus avant qu’il ne fasse des ravages sur un ordinateur, à condition de rester attentif aux symptômes et de choisir la méthode la plus appropriée :
Si possible, restaurer complètement l’ordinateur en le réinitialisant. (Attention à bien sauvegarder vos données avant)
Un scan de l’ordinateur, si vous avez le moindre doute, un scan fait par un anti-virus permet d’en avoir le cœur net, à condition que l’antivirus soit à jour. Un fois le scan terminé, l’antivirus envoie un rapport sur les menaces détectées. La plupart des antivirus propose dans la foulée de bloquer les éléments les plus problématique. Pour certains, il faut avoir souscrit à la version premium. Le processus s’arrête là dans la plupart des cas.
Utiliser une clé USB ou un disque dur de secours en cas d’infection grave, empêchant l’ordinateur de s’allumer, ou au contraire, pour éviter que le virus ne se déploie complètement dans un ordinateur infecté. Dans ce cas, il faut recourir à ce type de support pour scanner le contenu de l’ordinateur via un autre ordinateur sans avoir besoin d’allumer le premier. Le plus souvent, cette méthode permet de supprimer le virus sans avoir besoin d’allumer l’ordinateur. La clé USB ou le disque dur de secours peut généralement être fourni par les éditeurs d’antivirus.
Méthode manuelle : pour certains virus particulièrement sournois, c’est la seule façon de nettoyer l’ordinateur. Elle est réservée aux utilisateurs ayant de l’expérience et de solides connaissances en informatique.
L’utilisation d’un anti-virus et ou d’un VPN peut-être nécessaire.
N’hésitez pas à lire notre article sur les VPN (Cliquez-ici) ou bien sur l’anti-virus Nod32 dont nous sommes partenaires officiels avec ESET ! (Cliquez-ici)
En cas de virus, n’hésitez pas à nous demander conseils et aides ! Nous pouvons même faire le maximum pour récupérer vos données en cas de perte ! (et non de vol)
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As for the two people around Lan Changhua, Du Heng was also very impressed.Why, isn t orthopedics bad Li Chengzu asked doubtfully.
After bringing the patient s wife to the consulting room, Du Heng didn t speak in a hurry.The delicate man also wanted to take a look, but he didn t dare to squeeze in with the two of them.
When my brother started raising sheep last year, I specialized in diseases related to animal husbandry.How can Dr. Du not listen to them A couple s words Zhu Minyan opened her mouth, but she swallowed back her retort.
The speed of gossip is faster than the speed of the wind.
And the people in the mountains can be arrogant, they are bully and afraid of the strong, but they are not stupid, nor are they brainless, but they are smarter than anyone else.Wu Shengnan had no experience in field work, so she was assigned to the hospital.
He didn t have any biological brothers, so no one could pick up the body on his mother s behalf.She no longer had the courage to pick up a mirror or look through the screen projection of her mobile phone to see her current appearance.
But not two minutes after he sat down, Wu Buwei walked in with an embarrassed look on his face.Lan Changhua looked at After Du Heng finished writing, he said, I heard from Xiao Cao that Dr.
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It was difficult for a village doctor like him to improve his abilities.Three times a day. A total of more than ten drug names came out of Du Heng s mouth, while Wu Buwei quickly recorded them with the pen in his hand.
Xiao Li went out to call someone, and Yu Haiting asked doubtfully, Dean, how is the patient It s nothing serious.Dean Li, don t make fun of me. I am not the dean. Why, the acting dean is not the dean. Grow Judging from the leader s attitude in talking to you today, by the end of this month Transform Your Body: The Dr Oz Keto Crave Gummies and the Power of the Ketogenic Diet at the latest, the pronoun on your head will definitely be removed.
It s not that difficult and can be done in just a couple of minutes.Of course, there are additional commissions and subsidies for medical care, so five hundred is quite a lot.
He looked up at the junior student in front of him and asked, Junior, is this really possible .
The junior student suddenly raised his chest and said, Brother Guan, you have to have confidence in yourself.Doctor Du, you are awesome. Someone raised his thumb.
Some of you may have seen it before, but this is the first time you hear it.Or I would make tea in the living room, or go to the kitchen to cook, and then go back to bed.
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The six people looked at each other, and the six immediately started fighting, retreating while fighting, trying to stay away from the four of Meng Xun.He pushed aside the two elders who came to help him, pointed to the two Yu Liao who left below with one hand, and said You two don t give it to me.
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You can also buy things you like, and you won t have much time to play in the next few days of competition.Tan Su looked into Master s line of sight and noticed that this was the boy who was about to go up the mountain earlier.
The name of the store is very strange, just like the previous garment store was called garments, Now this store sells women s hairpins, which are called hairpins.The reason why he is so sure that they are ordinary people is because the incense in this room is different.
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