Cant log into Windows 7 Home Premium

Hi, sorry if this is the wrong place to post this.

Had Windows 7 home premium for around 2 months on a brand new desktop. Never had a single problem with it untill today. Turned it on as normal, got to the log in screen where i click on the required user. As the pc is only used by me I only have 1 user availiable. I click on it like normal but this time i get a message saying 'The user profile service service failed the logon' 'user profile cannot be loaded'. It then refreshes the page and returns me back to the logon page and if i press enter the same thing just keeps repeating itself. Other option on this page are the shutdown/sleep/restart option and a little box in the bottom left corner called ease of access with various options, but none that seem relevant to the situation.

Thanks for your time and advice is greatly appreciated.

ok is there any particular reason for this? and is there anyway to fix a corrupt profile?

Try booting the Win7 DVD Repair console or Repair CD, see if it offers a repair to accept. If it won't start, boot back into DVD/CD to Recovery Tools list to run Startup Repair to see if it will fix it. Accept any offer to System Restore. If it won't fix it, then boot back in to run System Restore manually, trying to get before the problem began.
System Repair Disc - Create
System Recovery Options
Startup Repair - Run 3 Separate Times

You may be infected. Download and burn to CD a bootable AV to run full scan: http://www.techmixer.com/free-bootab...download-list/

If Win7 won't start, you can copy out your files using this method: Copy & Paste - in Windows Recovery Console

Then run Factory Recovery partition or disks, or clean reinstall Win7 after wiping HD of any possible infected code: SSD / HDD : Optimize for Windows Reinstallation