Problem in opening the registry window

It lokks like it's a problem with File Association. Try the following:
Open My Computer > Click Tools > Folder Options > File Types

In File Types look for "REG" Select it.. Click Advance

To Merge, Application used to perform action: regedit.exe "%1"

To Edit, Application used to perform action: C:\WINDOWS\system32\NOTEPAD.EXE %1

That should do it for you.

Dear friend,

My laptop window is not opening after starting the labtop but power supply is there.
The bluish screen is coming after that it is not starting futher more.
Please tell me what is the problem?how it is happned ? provide the solution for the same.

try typing regedt32 in the run box and see if this works