To be honest you shouldn't get afraid of telling your father about those scratches, I have done much worst to my dad's brand new cars. I reversed his brand new X5 when we went to his friend's son wedding. I banged his another new Nissan into a truck and right off his new car and alot more examples in my history of driving though each time dad didn't say anything to me.
Yea I talked with him and he took a calm attitude .
I'm sure I've some kind of malware(s) in my computer. It runs so slowly and the browser disconnects often. I think I'll install some new anti-virus softwares (I've thought Avast and Spybot Destroy, we have F-Secure at the moment but I reckon I need more insurance).
Depends what is the problem with your pc. If you suspect it has spyware then install Malware bytes (free of charge). It is one of the best in the world. Secondly if you are looking for installing Antivirus then go for AVG 8.0 (again free of charge).