restart ur computer, press f8 , select safemode with networking.

if u have another computer, login to that computer

go to google.com

type combofix, select the with the website that says bleepingcomputer

download it..and run it(if u are running it in another computer click on save as and save it to ur flash drive, and once u plug in ur flash drive to another computer, make sure u copy it and paste it to ur desktop of another computer that is infected)

if ur internet works in safemode its fine..if it doesnt den follow the step above

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once this is completed

go to google.com type smitfraudfix

select the one that says "siri"

download it..follow the step above.

third go to majorgeeks.com

download the software "ccleaner"

clean temp files and all

and select the one that says registry and clean it too

....................................

the same website or google it to find it in that website

DIAL A FIX

click on check mark..and click go

after finishing it  click on policies

click on unhide

and click remove

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ur commnand promt will b back..ur control panel will be back

etc

den install the antivirus software u got..

update it

scan ur computer

u will be good.

have fun.