Windows 7: BSOD after install of ATI radeon HD 5450

Hi, sorry for any errors i make while posting here as this is my first time. I recently installed my ATI Radeon HD 5450 and ever since i have been getting BSOD's on a regular basis, usually 4-5 a day! i have tried putting in 1 stick or 4gig DDR3 ram at a time and it keeps happening so im thinking it might be a driver issue, however i have updated all my driver and still no luck. I also ran verifier and it said the problem was HIDCLASS.sys. I have attached the last 9 mindump files and am hoping someone can help me out, thanks to all in advance for helping as this is my first time using this forum. Cheers


New machine, 3 months old, all brand new, windows home premium x64 bit box