I'm reading a lot of posts about win7 hanging on the logon screen, and the solution seems to disable some network service, but I can't boot in normal, not in safe mode, last working config hangs too, I have no system restore point. So who do I apply any solution? If I try to access the computer from a network it seems to work, I can see the hard drives and programs like teamviewer or logmein are working too. But I can't get to the desktop in any way, the task manager won't open either. The only thing that I can do is select the repair option in the F8 screen, and use the cmd promp, can I fix something from there?

You can restore your registry files manually to an earlier point by going through the steps outlined below. The process is involved and requires some careful typing. Ask a computer-savvy friend to assist you if you lack experience in this area. Note that it might reset your password to an earlier value. 1. Keep tapping F8 during the early boot phase. 2. Select Repair from the menu that looks like this one: http://windows.microsoft.com/en-US/windows-vista/Advanced-startup-options-including-safe-mode 3. Log on as Administrator if prompted. 4. Select Repair when prompted. 5. Select the Command Prompt from the menu that looks like this one: http://windows.microsoft.com/en-US/windows7/What-are-the-system-recovery-options-in-Windows-7 6. Identify the correct drive letter for your Windows installation. It could be a drive other than C: but it won't be X:. You do it by typing the commands dir C:\Win* dir D:\Win* dir E:\Win* until you find the Windows folder. I will call that drive "Q:". 7. Type these commands: cd /d Q:\windows\System32\config xcopy *.* Q:\MyRegBack\ cd RegBack dir 8. Examine the dates of the Software, System and SAM files. Were the files created before or after your problem became apparent? 9. If they were made before the problem became apparent then you can type these commands: copy /y software .. copy /y System .. copy /y Sam .. (the two dots are part of each command) 10. Reboot normally. If things do not work out then you can backtrack by copying the original registry files from Q:\MyRegBack to Q:\Windows\System32\config.

Thanks for the answer, I tried that, in step 8... curiously... the dates of those files it's beyond the current date... (it's 8 of november 9:47 AM here, and those files have the same date but 10:XX am time), so either the date and time on the bios it's wrong or in windows... so I don't know where when those files modified. I tried step 9 as you said just in case. Normally starting windows led me to an auto chkdsk. And it's stuck in the same screen, please wait on the logon, turn black for a few seconds (I see the pointer) back to win 7 please wait, and so on and so on.

The BIOS stores GMT and Windows translates this to local time. If Step 9 failed to fix the problem then it is caused by something other than the registry. If so then I have no fix other than a destructive Factory Restore.

So there's no way to disable services from the command prompt that I have access to the repair option? I really don't want to reinstall everything.

So there's no way to disable services from the command prompt that I have access to the repair option? I really don't want to reinstall everything. Which service(2) do you want to disable? There are several options to reboot a Windows machine: Normal mode (which does not work in your case)Safe Mode (press F8 at boot time)Last known good options (press F8 at boot time)Windows Repair Mode (press F8 at boot time)Windows Repair Mode (boot from a Windows Repair CD) To avoid having to re-install everything you need to take out some "insurance" by creating an image of your installation and updating it once or twice a year.