Is my recovery partition infected?

Three days ago I got infected by a backdoor.graybird. I turned off wifi and norton said it removed the two tmp files that were found, but me being suspicious, I installed a couple of AV programs an one called ewido said I had spyware.yarez and baidu. Knowing some malware can infect this drive and reinstall, I did a complete factory restore. Everything works great but then again so dis my laptop over this whole ordeal. I might have overreacted, but now im very paranoid. I have win7 and the laptop is from dell. Please help. Or give me assurance.