Windows 7: Can't log on onto my account????Problem..

It looks like a problem...and a big one,too.
First,I have to say that I am not restarting my desktop quite ofen,and I'm not even shutting it at all,and today,for some reason(there isn't any!),I've restarted it.
And that was the dumbest thing i could do!
Yesterday evening,since my primary partition isn't so big,and I was downloading several big torrents in same time,I was counting will I have enough space on drive(question of megabytes),and cause of that,I have erased all system restore points,took a little space of system restore space,and made just one restore point.
This morning,I have take a look at torrents,and everything seemed a bit slow,and CPU meter wasn't dropping under 40%,so I decided to restart it.
And here it is,a problem,it jumped out like a wild cat from a water.
After restart,I've got"Caution,you are logged on as a temp account and it will be erased after you log off"(or something similar,can't remember exactly).Just to let you know,I have turned of logging cause nobody else is using that desktop.I have searched all PC to find my temp account folder,and I'founded it through user accounts,but there is no way that I can see it in a folder view,and there is no space on drive C: either,beside it,I've found another account,probably that is the new one which is erased every time I log off(I tried it couple of times),named exactly the same as my old one.If I try to copy my old account to another partition,I can't do it.I tried to use system restore,but there is a message"There is no system restore points" even if I know that I made one,and system restore is turned on.I am not smart enough,and simply I don't know what else to try.
And the best thing is that I was just about planning to install(with making back up of all my passwords,mails,documents and other stuff which I need,of course,and not like now,with losing everything) a 7022build,and maybe a day or two ago,I was asking about what of backup software like Acronis or Norton ghost is compatible with windows 7 so I can make backup on fresh install.Please,don't ask "How comes that you don't have back up?"

Please HELP,probably anybody knows how to solve this maybe?
Right now,I am going to install LogMeIn,or some similar remote program,and maybe there is somebody a little bit smarter then me.
I know that my english isn't the best but I hope that you have understood.

Sounds pretty serious, maybe you have deleted something you should not have accidentally, you might find the best option is a Repair Install, it will reinstall Windows but you wont have to install all your programs again.
Repair Install

Hmm...I have found some torrents downloads in My Documents,but I had to change Folder views,and I can't reasociate them with "new" account,and desktop is clean as new everytime I restart PC,and also every change I made.

I have ALL my programs in Programs folder,but every single shortcut I make to desktop is erased every time I log on,also as all desktop changes,home page in IE(cause Firefox is erased every time),accelerators...I don't know,but everything.
I wonder what have I erased?I'm sure that I didn't erased anything intentionally,but what have I erased accidentally?It has to be something connected with my system restore "cleaning",and cleaning temp folders with CCcleaner.
I remember that I had woke up about 7 AM to let the dog out,and I saw Malwarebytes scanning the system which means in that time there were still queus in temp folder.
Now,when I think better,I didn't erase anything,maybe I have just replaced something,or better missplaced.

Aaaaagh....IT HAS to be one-click or two-cliks problem,probably some path is wrong.
As I can see when I look dektop shortcut properties,they are targeted on "Public Documents",so it means that "Public Documents" is start up folder,which means again that I have to change the start up folder path(and that is what I don't know how and where to do)to my"old account",or I have to replace "Public Documents" folder with my "old account".
My "old account" folder is still there and that was the ONLY account ever maden,but for I dont know which reason,DEFAULT account isn't that one.So question is:How could I make my ex-default account(one and only account) DEFAULT account right now?Copy-paste folder to folder doesn't work because present "default" account is in use.If I make another user account,and give it admin rights,and copy that "old account" folder onto that 2nd account which I am planning to make,would it work till I finish downloading 7022build,and Acronis,Norton or whatever back up program,and backing up all my important stuff,so I can make clean install then?I'm affraid that system will place second account onto place my "old account" folder,and I'm gonna lose it if I try...

Had this happen to me a while back..

I logged in with the 'temp' profile. Copied all my stuff from my user folder in C:\Users and then created a 'dummy' users with admin rights called something very diffferent.

Logged in as the dummy account, deleted my old profile, created a new one. Then logged in with the 'new' profile and copied all my docs and pics etc back to where they should be. Finally I deleted the 'dummy' profile and cleaned up the copied stuff.

Not sure what caused it but never found a better solution.

Yes,I was thinking about something very similar but quicker and now.....I am getting it in....pffffff...smoke is still coming out of my ears.
I decided to do that much quicker,just to copy alllll my "old"profile onto a new one,and I've used "unlocker" so I can move files what are in use.And,bum,cut->paste but on wrong place inside "new" profile,and everything messes up.Of course,restart,and PC is not booting :-O,erhhh...it is normally booting but system can't find desktop because it is removed or replaced.And there is nooo way that I can repair it even through safe mode because I can't access it(access files,not safe mod).Then I try to repair it but since it checks booting,and system boots till certain point,it found no misstakes.
Aaaaaaah,I wanted to jump over the window,who is crazy here?
So,I had to create another Windows 7 partition so I can even access first one,which means that I have dual boot Windows 7,both 7000builds.After I have installed it,I don't know why,but I had to take ownership of every single subfolder and file of my "old" folder what I copied inside my "new" profile folder,and it didn't even let me to take me ownership of one folder and it's subfolder,then I had to do it manually for every single folder instead.So now,I am doing what I was suposed to do at the first place but after a lot of useless work.
At the end,I didn't succeed to save properties of my desktop,customization,etc,but I saved files,mails,favorites,docs and passwords.
I should listen to Mr.Grim,loose my customization,manually make shortcut of every program and file,and save my self a lot of work.

I know this is a little late but the same thing just happened to me. I had just finished downloading a torrent file that was about 3GB. My C:\ drive has slightly less than 50% free space. I put the 3GB file on my desktop so I could restart my computer to get my Drobo running. I restarted and when I tried to log in it sent me to this "temp" account. I immediately moved the file from C:\Users\username\Desktop to my drobo. I then deleted the file from the desktop, emptied the recycle bin and restarted. After that I was able to get back on my account.

Weird!