Inspiron 5110 recovery and user account problem

Hello everyone!

I am a proud user of Dell Inspiron 5110 (win7 Home Premium x64) and it has 5 years. About 3 weeks ago I wanted to perform its first win7 reinstallation - it was needed.
I was too stupid to read about recovery partition before I did format C: . But well, it worked. I saw new win7 logging screen but without Dell signs anywhere. I couldn't activate my system because there was no drivers for WifI etc. I checked my partitions after format and clean reinstallation and I saw :
- disc 0 partition 1: DELLUTILITY 100MB , empty space: 99MB, OEM
- disc 0 partition 2: RECOVERY 14,6GB , empty space: 6,9 GB , SYSTEM
- disc 0 partition 3:                          227,1GB, empty: 213,4 GB, win7 installed here
- disc 0 partition 4:                           223,8 GB, empty: 223,8GB , partition for my things

So when I saw this I decided to download using my friend's laptop WiFi drivers and Dell Backup and Recovery program. I performed recovering, waited patiently aaaaand.... After reboot I saw again no dell signs (this blue background and dell's logo on login screen) and I could NOT log in using my old name and password. Additionally I had no "welcome new user" screen with cofiguring those things AND I cannot perform another recovery because I don't know user or password... Only what is shown is : UpdatusUser in login but password is unknown to me.

I know it's all because of my ignorance but I would like to stay on my computer as long as I can.

Thank you for reading.