the problem is still remain same. i replaced two no. memory chips of 64mb with one of 128mb.the only change is in the frequency of occuring. somebody suggested that this is not a hardware issue . instead of when windows processes mixes then this sort of error occurs. and it can be solved by defragmenting hsrd disk. unfortunately this will also not work. now what to do?
before you started adding memory to your computer, everything was working fine, correct? if so, go back to the last known good configuration and start there. Once you have a stable starting point, then you can start adding components and see what causes the failure.