I have a non branded netbook with no CD drive and i want to reformatt

I have a non branded 10" netbook for my son which i brought back from Hong Kong with me when i was on a business trip. there are no ID marks anywhere but it is new. The windows is not a genuine version and the wireless doesnt work.
Can i find somewhere online to wipe it clean and re install an OS, it doesnt have to be windows as its only for my sons homework and get a new wireless driver
Any help would be apprieciated