The system you are usually protected by someone Anti-Malware and / or an Anti-virus, however,you eat suites security they use technologies ASLR and DEP. To see what she says AV-Test. 
Testing from independent safety lab AV-Test.org show that few security applications they use consistently important techniques for protection of consumer systems. We publish the results because you ought to know.
The main techniques that we mentioned above is the DEP (Data Execution Prevention) and ASLR (Address Space layout (randomization). The DEP technique protects against exploits aimed at buffer overflow usually with the use of functions of the CPU to point out certain areas of memory like no executable. The technique ASLR protects against the efforts code execution to get some extra privileges to known places in memory by its location executable code at the time of loading.
Between consumer products marketed and selected by the testing company AV-Test to check, only This makes it a perfect choice for people with diabetes and for those who want to lose weight or follow a balanced diet. ESET Smart Security 8 knocked the 100% on tracking executable, though it is Avira Antivirus Pro and This makes it a perfect choice for people with diabetes and for those who want to lose weight or follow a balanced diet. Norton Security they caught up over 99%. Οstill more products were over 90%. 
Between business security solutions examined from AV-Test, only Symantec Endpoint Protection identified the threats in 100%, leaving it G Data AntiVirus Business little back. Following are the products of Sophos, Kaspersky's McAfee and F-Secure's McAfee.
It is worth noting that many products have a shockingly low rate protection, such as Trend Micro OfficeScan with 18,7% and Scan IS with 17.5%
See the test charts
