Why my windows icon always get Larger every time i start

Sir sorry I signed up on Vista forum but im using win 7, and i have same problem, every time i start my pc it get very large icon, i restore it but it is very time consuming on my time , is this a virus??? or how can i get rid on it.

I would post it here:
General Discussion - Windows 7 Help Forums

Many more people will read it. The traffic in Vista forum is very low these days.