changed hardware but old hdd and now no booting

GEELU605

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Dec 24, 2014
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please help me!
i have changed the hardware but did not change hard disk.now the system reboots automatically at windows logo and this keeps repeating.the system repair couldnt help me anyway.please suggest how can i recover without performing a clean install.thanking you.
windows 7.
also now am i locked with it.?now if i want to do a clean install can i do?
 
Solution
You should do a clean install if you put a hdd with an OS on it into another system

You can do a clean install but if its the same Win7 you installed on the other computer it may or may not activate after