From what you tell, it seems a hardware issue. That means that it's time for a new laptop.
I have a Lenovo T30 laptop which is running windows xp. It has at the moment 256 of working ram.
Last week I got hit with the TR/DropAgent.qna trojan virus. Prior to this I didnt have any problems with my computer.
I managed to completely get rid of the virus which was difficult as it wouldnt let the updaters connect to any scans. Now however one of the two 256 chips of ram is not working. It is not the ram itself as I have swapped them over into both slots and both work in the same slot. It has just effected the one slot. Also the keyboard is beeping and I have had an error message saying stuck key. The keys all appear to be pressing and releasing ok.
I added a usb keyboard so that I have a working one. I booted from puppy linux (which I am not familiar with) amd the keyboard stopped beeping. The ram still showed as being 256.
I have tried to do a chkdsk from windows bootup but it stops due to the key which is stuck. I went into the c prompt and tried chkdsk /f from there and it told me it could not contiune in read only mode. I then tried chkntfs c: and it told me it was dirty. When the computer boots up the F! key should go into the bios but I am getting a black screen with a small box thing on the top left corner and a blinking cursor.
Can anyone advise me how what I could do to do a chkdsk and what might have happened to the memory slot that is not working.