Eureka, I bought the new computer atlast. After 4.5 years of efficient usage of my old workstation I bought this.
Intel Core 2 Duo E6550.
Intel DG31PR Motherboard
2X1 GB Kingston KVR667D2N5/1G DDR2 667 RAM
Zebronics Lava Cabinet with 500W SMPS.
Western Digital WD1600AAJS 160 GB SATA 2 Hard disk with 8 MB Buffer.
Samsung SH-SH203D DVD Writer
Pinnacle PCTV Tuner kit for Windows Vista
I gave the following configuration of my old PC as buy back.
Pentium 4 3.06 GHz
Intel 865GBF Motherboard
2X1 GB DDR2 400 RAM
Frontech Pace cabinet
Samsung 80 GB SATA 1 HD
Samsung optical drive
Pinnacle PCTV 100i TV Tuner.
Along with this I had to pay Rs 8k
I will buy a GeForce 8600GT with 256 MB RAM, LCD Monitor & a Cooler Master SMPS next month.
However, the most important thing....
I DID NOT NEED TO REINSTALL WINDOWS
I connected my old harddisk to copy data from old to new harddisk but forgot to change the boot drive, so instead of my new SATA hard disk Windows booted from my old 80 hard disk & to my shock, it worked fine. I m using the old windows Vista in Old HD to write this post at this moment.
But that's not all, since I found that Windows is working, I made a Windows Complete PC backup using Windows Backup & restore center & then booted using the Vista DVD & copied the old installation image to new hard disk's C Drive & it again..worked fine
Most important, I did not need to migrate my license. Windows told me it need to reactivate, I just clicked to reactivate & my new motherboard & HD have the old license working just fine