Originally Posted by guruprasaad
One more point, actually in my motherboard capacitor started to bulge.
Well, something will work less well than it did. This capacitor is probably on a power supply and that particular voltage rail will no longer be able to operate within specifications as the current used increases.
That is a problem, unless you have a plan to repair it, the board is probably not long for this world, and it may be the root-cause of this problem (although, towards the end of the life of a piece of hardware, they often get several problems).
...question If ram is problem how my windows working. Also linux also boots perfectly. If ram is the culprit problem should come while booting also know.
No. If you had actually tried memtest, you would see all of the different patterns that it uses and you can very easily have a failure on one pattern and not others. Unless your operating systems access the memory in the same patterns (...and broadly you know that they don't, otherwise they'd be the same operating systems...) and at the same time intervals, it is clear that you can have failures in one and not the other.
And 'boot' proves even less; in boot you use much less than the total memory, so you can have areas of memory completely failing and still boot.
Having said that, the suggestion of testing memory is largely because it is the easiest test to do; it may not be the memory chips themselves, but memory, cpu, some of the voltage rails and a small amount of the chipset are all tested by the memory test, so there is a good chance that a failure shows up as a memory error of some kind.