user profile service failed to Log on

I tried to boot up my Acer laptop windows 7 (obvious I guess) when the above phrase came on the screen after I had typed in my password. The second phrase is " User profile cannot be loaded"
This has never happened to me before, on this computer nor on any other.
I have logged off and restarted the machine several times with different amounts of waiting time inbetween.
I plugged the laptop into the main current, and when I clicked "OK" in response to the above messages, the computer went into download mode of updates (34 to be exact)
What do I do? How do I access windows? Do I try and change password? will it accept the changes even when it will not let me log on/in?
I am flummoxed

Home premium repair disk is not available on line in disk nor USB. Safe mode does not come up on screen. It did once and when I clicked 'in safe mode' it went into list mode on black screen and then shut down going into upate loop of shutting down and starting up again installing updates and shutting down.
Now, for some reason, I am back at point A with 'no up load of user profile' notice. I do not have hard ware version of this Windows 7. I had a pack to down load from on line when I brought home the new computer....
What do I do now? Do I have to go to a repair shop?

I tried to reset password. Wizard wanted a USB or floppy disk (do they still exist?). I found a USB that computer recognised but THEN informed me that it was not the password reset disk...... I am going to jump out a window soon....

I AM working from another computer (mine is not booting up) and it is running XP so I went the route of the online version but Those did not have any version (disk or USB ) valid for my Home Premium OS

I push ctrl - alt - delete and NOTHING happens.... how am supposed to get under the Windows overlay? How do I provoke safe mode blue screen? Is there some soft ware I could down load on to a USB that would act like the 'password reset" usb/disk?

I pushed F2 button on start up and found myself in another realm. I took out and reinstalled the battery and now the laptop gives me safe mode blue screen option. I am on line with sick laptop in safemode with network connection. No sound. I did recovery, rebooted and stilll no possibility to log into my username profile. F2 information is that userprofile password is 'clear'. Does that mean that user profile password was erased? Many recovery and other interventions cannot be done in safe mode. The computer does not work in regular mode, I still cannot logon to user profile.