A computer virus is a computer program,which gets loaded into the memory without the user's permission and gets excuted.A virus program attaches itself to files or boot sectors and replicates ,thus continuing to spread.A virus generally harmfull and can cause serious damaage to data and affect system performance.Another hand it takes partial control of the machine and depending upon the virus.
The following may happen;
The programm spreads to unifected disks.
Disks access is considerably slowed down.
Floppies do not boot a many more
There are various types of viruses.Mainly tow types-1.Boot sectors/partetion table virus.2-Excutable programms such as .COM,.EXE,.OVL,.SYS,.BIN,.VBX etc.
How does a virus works?
A virus inactive untill the infected program is run or boot record is read. As the virus is activated,it loads into the computers memory where it can perform a triggered event or spread itself.Disks used in an infected system can then carry the virus to the another computer.Program downloades from bulletin boards can also spreads virus.Data files ,however ,can not transfer a virus but they can become damaged.
What should steps to prevent from virus in ours personal computers?
There are various steps for prevention-
1.Once a floppy is made virus-free ,make it write protected.2.It is advisable to check all disks to detect virus.3.Do not use any floppy which is not yours ,or is not checked first to detect any virus.4.Install a virus guards,which will immediately inform you against a possible attack of a virus through a message.Some of the commonly used virus utilities include NORTON,MCAFEE,DRSOLOMON,RED ALERT,PC-CILLIN,MICROSOFT ANTIVIROUS.
The following may happen;
The programm spreads to unifected disks.
Disks access is considerably slowed down.
Floppies do not boot a many more
There are various types of viruses.Mainly tow types-1.Boot sectors/partetion table virus.2-Excutable programms such as .COM,.EXE,.OVL,.SYS,.BIN,.VBX etc.
How does a virus works?
A virus inactive untill the infected program is run or boot record is read. As the virus is activated,it loads into the computers memory where it can perform a triggered event or spread itself.Disks used in an infected system can then carry the virus to the another computer.Program downloades from bulletin boards can also spreads virus.Data files ,however ,can not transfer a virus but they can become damaged.
What should steps to prevent from virus in ours personal computers?
There are various steps for prevention-
1.Once a floppy is made virus-free ,make it write protected.2.It is advisable to check all disks to detect virus.3.Do not use any floppy which is not yours ,or is not checked first to detect any virus.4.Install a virus guards,which will immediately inform you against a possible attack of a virus through a message.Some of the commonly used virus utilities include NORTON,MCAFEE,DRSOLOMON,RED ALERT,PC-CILLIN,MICROSOFT ANTIVIROUS.
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