Windows 7 resetting

Hi. I have a problem when i shut down my pc and later turn it on everything just resets it self.. my browsers, desktop icons, everything acts like i just instaled it.. always have to login again. My pc is running Win7 Ultimate.
Answer #1
Are you sure you didn’t install any software like Deep Freeze ?
Answer #2
And is it a work computer or joined to a domain
Answer #3
No deep freeeze.. formated all on my hdd 15 days ago then installed win7.. I have some basic programs intsalled on it like photoshop avira autocad torrent skype and thats all.. its my home pc
Answer #4
i think it can be only a virus for this