Hello and welcome to BC danyo
Lets start with a few basics:
What are your system specs? CPU, RAM, and even hard drive space would all be helpful here. If you are not sure, a make/model number on the computer would help.
Are the problems the same if you are online or not?
Is there anything in particular that you changed, prior to the problem starting? Even upgrading to SP2 can cause problems with some people.
By the way, your English is wonderful. Better then mine. I had to change a couple of things after I re-read it, before posting
We are all curious like a cat. We wonder, we ask, we learn.
Please post back when a suggestion works, so that others may learn.