Hi mate,
Both incidents appear to be unrelated. I would suggest the followng:-
1) Disconnect original drive and put your Windows disk(installation disk) into DVD drive, the FORMAT NEW drive. Reasons being that Windows will see the new drive because I assume it is unformatted.
2) Reconnect original drive and boot up Windows as normal, you should then see new drive.
In regards to the other issue, I think it might be down to dust shorting either the PSU or motherboard, give the PSU a close sniff and examine the board closely. If any signs of damage to either, replace asap.
Basically the two events are unrelated and merely a coincidence.
Regards
Von