well, the memtest showed bit errors when a pattern of bits were applied
basically they wrote something like 10101010 but got 10101011
that means the charge in the electronics leaked from on capacitor to the one next to it.
It is a common failure of ram. I have seen estimates that as much as 6 % of new ram will fail this test.
if you isolate the ram and test each stick and it still fails (at the same memory locations) I would replace it.
The ram will cause problems with windows but in the old days people did not let windows sleep very long with out rebooting. Often the machine would crash due this type of error once in about 8 or 9 hours. Windows has to put something critical on the bad spot in ram before it would have a problem. Because of all the malware and virus/hack programs windows now does checks on its components in memory and if it finds one has been modified in any way it will call a bugcheck. Windows only check certain areas in so if the memory is used by an app the app my not work as expected. since the newer systems sleep, the are actually paged to the hard drive and the modified code caused by the memory failure get saved to your hidden c:\pagefile.sys and mistakes will be reloaded back into memory even if it is loaded into a good portion of memory. It makes a mess, you have to delete the hidden pagefile and create a new one after you fix the RAM problem. My wife had this problem on her machine, I just ended up pulling its memory and put the memory from my machine in it so she would not have to deal with her machine crashing.
by the way: her memory worked without errors on my machine.
I would pull the memory and look for new memory that has faster timings or set your current memory to a slower clock and see if you can get it to pass memtest. if you can not, just replace the memory.
I7210I :
so i did install the latest version (even though i have it) + did reset and than run the memtest and still i got red lines.
also yesterday i install the bad ram near the CPU and did run the memtest and i got the same results
and i didn't understand yet if these is a problem of the ram or the bios?
about the timings, there is point to change them again? now they are on 2 as you said, i don't know if these was help or not but i know that i didn't got any BSOD from the time i was change it but..the memtest still red