problems with booting

I am running Windows 7 on an Asus laptop.
Suddenly today it would not boot.
I get past the password stage and then the Welcome to Windows circle appears and it just stays there revolving.
I was able to boot in Safe mode.
But as soon as I switched to regular this problem occurred.
Do I need to boot in Safe and then go back to Restore the system to an earlier version?
Please advise.
Who is Participating?
tailoreddigitalConnect With a Mentor Commented:
Yes, restoration is ideal and easy in this situation.
aadihConnect With a Mentor Commented:
Try system restore from the safe mode command prompt:  rstrui.exe.
digiselAuthor Commented:
tried booting in safe mode with the command prompt - same thing
have re-booted in safe mode but cannot see where I can enter the command .....exe that you provided.
please advise and also the exact syntax.
When you bootup in safe mode with command prompt, you will see a command prompt (e.g. C:>).  After the > sign, type rstrui.exe and hit enter.
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