SOLVED Strange lag on single player

Hello everyone
Previously,i was not taking this problem but if i play on single player,it happens strange lag this way.I didn't find how to solve :/ there is same problem on multiplayer.I tried low settings&full settings i closed hdr etc.

i have a 2,70 ghz dual-core processor and AMD Radeon HD 6770 graphic card and 4 gb ram

*** I removed rFactor2 and again installed and problem solved***

 

Does it happen on all tracks?
Does it do it when driving or just when watching replays?
When driving do a Ctrl C and report length of purple bar.
What wheel do you have?

 

@DJCruicky yeap,it happens all track,it happens i'm driving,naturally same replays.
I'll add report lenght of purple bar
I have a Logitech Momo

*

 

http://isiforums.net/f/showthread.php/1522-Software-is-jerky-falls-out-of-realtime-CPU-is-100

 

I'd bet he's running out of RAM.

 

I tried like link but problem didn't solve.Last update already install,so insteresting :/