Windows Vista Home Premium Stop Working

[svr2009wwe]

Hi, guys.

I had Vista home basic with ACER CPU.but after that i've installed vista home premium without licence.It worked for like four months.but after that when i start my computer it ask me for serial key.I'don't have it.What can i do?

 

[AdmnPower]

You'll have to go back to home basic or purchase a license to continue using the software.