TAMMU

My system configuration is:
PC no.1.....Intel Motherboard D945GCPE,2GB RAM,250GB Segate sata HDD,
Windows XPsp2,No extra Video card or sound card installed.
PC no.2....MSI motherboard PM8M-V,1GB RAM,160GB Samsung IDE HDD,Windows XPsp2.No extra Video card or sound card installed.
The problem started only after I tried to resize C partition and after putting this HDD in PC no2,same symptom occured in this PC no.2.
Now in both the PCs,If I install a freshn HDD,set up runs well and the keyboard also works in set up.If I put a HDD with OS loaded and if I want to Repair or Reinstall,the keyboard becomes nonresponcive.I am unable to boot from CD if a OS is already loaded on HDD.
I tried different bootable discs to boot but keyboard does'nt work
Thanks