|As you realized it was a mistake to convert logical to primary.|
The OS registry entries [4000+] wouldn't match with the change. Might boot but wouldn't load. End result is a bigger mess. Changing a partition always has dire consequences if you don't think about the upstream consequences.
Proper procedure is to restore the primary partition booting.
run recovery console [boot theOS cd/dvd via the bios]
execute the commands fixmbr and fixboot
does it boot?
if not then as suggested by Othehill a repair install is in order.
But the first rule of recovery is back it up. You should have imaged the drive before you started changing partitions. Even PM tells you that on the screen :)
At this state recovery is pretty minimal. I would try putting back the primary partition [trick will be getting it physically in front of the now converted logical to primary back to logical partition] back. Then do a repair install. End result is you have to redo all the service pacs but you are up runinng with your data and programs.
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