Good you're up and running again with working LAN @shoukat2003

Is UUID is necessary?. my system shows nothing in UUID. as you said my UUID is 90N3GPD34G2721VT30CU ; can i write UUID as i wrote MAC with BT.exe. ? OR should i leave it?

@shoukat2003 - UUID is sometimes tied to windows activation. Check "My Computer" properties and see if your windows is activated, if it is, check for windows updates and reboot, then check again. If it stays activated your probably OK with invalid UUID.

UUID can be added back into your BIOS, but not with BT tool. We'd have to do that on our end and you reflash or reprogram again. And to save from you having to redo the MAC again, you'll have to dump the BIOS via FPT if you programmed in a BIOS with unlocked FD, if not then dump it via programmer