Attacks to computers under management Windows with use Trojan Horses which problem is abduction and transfer to the malefactor of the various key information contained on a computer (passwords of access to the Internet, the user passwords and identifiers (local or on other hosts)) recently began to be used in increasing frequency. As ways of introduction such Trojan Horses on a computer are quickly improved.

One of ways to avoid infection such Trojan Horses is use of the anti-virus programs checking all mail or on-line on post servers, or locally on workstations. However first, these programs are not at everything, and second, 100 % of a guarantee of that the virus will be neutralized is not present, as new viruses and ways of their introduction develop with an advancing of an anti-virus software.

At the same time it is possible, following simple enough and easy recommendations, it is essential to lower risk of infection. The basic from them are:

* To not adjust the program of reading of mail on automatic actions (viewing, preservation, saving) the attached files

* To watch closely type of the attached files (Windows identifies type of a file on its extension). Do not overlook, that under expansion in Windows 255 symbols are removed and not in all programs it is possible to notice at once, for example, that the file refers to myphoto.jpg (250 blanks) .exe is a carried out file, instead of a file with harmless extension myphoto.jpg. To all carried out files it is necessary to concern as to potential enemies.

Methods of introduction of files as a rule are based on a carelessness or curiosity.