Hi 
Bob thank you for your help I found something in your link but unfortunately it xxx solution did,t fix my problems. I still have extremely slow computer. I removed some old programs,files with CCleaner ran Defrag,scan my computer with Registry tool nothing my Pc is stil very slow. Maybe this information is not important I have 1GB big RAM but task manager show only 376MB.
PS:Maybe it was unnecessary but I scanned my PC also with OTL. (I saw many people here in Avast forum use this program)
Thank you for your help.
Bye. Lep pozdrav 