Hi Vargekar,
If I understand you correctly, you got a NEW
system w a 27G HDD. Today you took the HDD from it, installed it in an OLD system, THEN installed Win ME, and THEN tried to reinstall the 27G drive back in your NEW system.
If this is true, I'm not surprised you got problems...
When you installed Win ME on your OLD system, the install would have built a set of Registry files on the 27G HDD reflecting the Hardware/Software state of your OLD computer.
When you moved the HDD backto the NEW system, those files of course didn't match the NEW configuration. (Things like BIOS&Chipset, Video config, IRQ's, etc.)
Therefore - *hairball!*
Unless you configurations are *identical*, this is NOT a good strategy.
I suspect that you will have to reinstall Win ME on your new system with the new HDD in it.
(Depending on differences between systems, you MIGHT be able to swap devices around, but I bet that would be *WAY* more iffy than just reinstalling properly, and you would still face the problem of unresolved registry errors.)