=) Hello... i use htc touch pro2

Hello..   my name is Nita...  I live in kansas city....   I started using the touch pro phone series in october 2010, I now have a touch pro2... this was my replacement phone about a month ago.  TOday my phone has flippped out.  I fell asleep with my kids at bedtime, we were looking at APPS in the MARKETPLACE program...  after downloading our selection...   and falling asleep..   i wake up and my phone has gone nuts.  when i turn it on, the OS doesn appear the same as this morning.  It looks like the original touch pro application, not the SLIDE TO UNLOCK feature and etc...  now instead, it looks like the large button display, like a phone pad..  no slide and no cool graphics..  my cute lock screen picture is gone..  theres no lockscreen!!!!!    I really enjoy my phone, I use the calendar and task manager...  i like the messaging system..  gotta love the FB upload function!  =)    Can anyone help me?   Also, I have also installed KASPERSKY windows mobile security, as of yesterday, my phone does not have any virus or anything of that sort..   Help! =(