to check them
shut off computer
open the case
pull one of the sticks of memory
restart and run it a while
a day at least maybe two
Do the same with the other stick of memory.
If it happens with one stick in the computer.
then that memory is possibly a bad stick.
If it happens with the other stick.
then possibly both sticks have problems.
Were these memory sticks new when you built the computer?
Or did they come from other computers.
A few things don't match up with the memory.
Hopefully someone else will take a look and see something more.
Hang in there.
disable startup items in msconfig.
type in msconfig
click the start tab and disable them one at a time and run it a while.
Re enable it if you have the same problem.
Then disable another item for a while and see what happens.
Time consuming I know.
But you have dealt with this annoyance for a while.
It may take a while to figure it out.
Someone else will come along and put in their input.
What antivirus are you running.
This could also be key to performance and freezes.