HP Pavillion p6-2213er started to slow down (the mouse, web, video and games)

Question

My HP Pavillion p6-2213er which is 1-year old with pre-installed Windows 7 (64) started to slow down/stuck today. 
The mouse, internet pages, movies and games started to work slow. Sorry, don't know the right English for it, but it looks like this: ---x---x---x (and normally it is xxxxxxxxxxxxx)
I made the full scanning for viruses: none. It's funny, but the problem started the next day after I installed anti-virus. Tried to delet the anti-virus. Didn't help. Task manager shows that none of the applications use much memory. There are no programs that could cause this running. I turned off torrent program. Restarted my pc several times, no result. Help? What the problem could be? I've had 3 different pc and never had that problem.
I've also had been seeing for few months that message about Tages Protection driver that was turned off due to its incompatibility with the system. Tried to reinstall it thru downloading the setup file from tagesprotection.com, but it just won't start. Can't delete it either, cause can't find it. But this can't be the cause of slowness, can it?   

Answer 1

Today I also had BSoD for the 1st time. It happened twice as I was watching a video downloaded from the internet. Could it be somehow connected to what I experienced before? 
Below are the details:
Сигнатура проблемы:
  Имя события проблемы:                 BlueScreen
  Версия ОС:                                          6.1.7601.2.1.0.768.2
  Код языка:                                          1049
Дополнительные сведения об этой проблеме:
  BCCode:                                               1000007e
  BCP1:                                                    FFFFFFFFC0000005
  BCP2:                                                    0000000000000000
  BCP3:                                                    FFFFF8800419D8E8
  BCP4:                                                    FFFFF8800419D140
  OS Version:                                          6_1_7601
  Service Pack:                                       1_0
  Product:                                               768_1
Файлы, содержащие сведения об этой проблеме (files containing informtion about this problem):
  C:\Windows\Minidump\051114-36847-01.dmp
  C:\Users\Елена\AppData\Local\Temp\WER-61089-0.sysdata.xml