Okay, so I rooted my S2 and updated it to 4.4.3. When I switched it on, everything was working fine but my Play Store said "Authentication failed!.. Blah... Blah... Blah... Retry" but when I pressed retry button I wasn't able to reenter my already entered ID. Then I deleted all Google services and apps. (I thought they would roll back to their original state and then I would update) but they permanently got deleted. Then I tried to download Play Store's APK. Now it's closing instantly. I am also not able to add any Google account. When I try to create an account by using YouTube app, it instantly closes(not the app but account creation form). What to do now? Any help would be appreciated.