posible virus ?

[Aaron Hicklin Panda]

hello i seem to be having issue with my pc timing out and going to the password screen witch is annoying when i am trying to dl a 30gb game and find it has only dl 4gb hear are my setting screen saver set to none on resume display log on screen unchecked ok now for my power options high performance (turn off display never)(put computer to sleep never) under advance power options i have require a password on wake up no \
turn hard disk after 20 mins
java script timer frequency max performance
desk top background settings slide show available
power saving mode max performance
sleep after never
allow hybrid sleep off
hibernate after never
allow wake timers enabled
turn off display after never
yet it still goes to the password screen anyone have any ideas oh and my os is win7
update:also i have seen it log off what happens is cmd pops up for a second and it closes everything that is open eg steam and firefox and then logs off is it possible its some sort of virus i have scanned my pc with avg and it found nothing can anyone help please

 

[Dark Lord of Tech]

Specs?

 

[Aaron Hicklin Panda]

not sure why the specs matter but they can be see hear http://www.tomshardware.co.uk/answers/id-2123261/build.html also i ran malwarebytes and found 30 odd threats got rid of all of them so that may of fixed the issue i will report back in a day or 2 as the log off thing do not happen a lot but dose get annoying when it boots u out of games

 

[Aaron Hicklin Panda]

yeah sadly malwarebytes did not fix it is there anyway i can find out what is this

 

[Aaron Hicklin Panda]

Specs?

the specs are there