How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7

Step 1: Perform a clean boot

Note If the computer is connected to a network, network policy settings may prevent you from following these steps. We strongly recommend that you do not use the System Configuration utility to modify the advanced boot options on the computer unless a Microsoft support engineer directs you to do this. Doing this may make the computer unusable.

1. Log on to the computer by using an account that has administrator rights.
2. Click Start
   
   , type msconfig.exe in the Start Search box, and then press ENTER to start the System Configuration utility.
   
   
   If you are prompted for an administrator password or for confirmation, type your password, or click Continue.
   
   
3. On the General tab, click to select the option Selective startup, and then click to clear the option Load startup items check box. (The Use Original Boot.ini check box is unavailable.)
   
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4. On the Services tab, click to select the Hide all Microsoft services check box, and then click Disable all.
   
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   Note Following this step lets Microsoft services continue to run. These services include Networking, Plug and Play, Event Logging, Error Reporting, and other services. If you disable these services, you may permanently delete all restore points. Do not do this if you want to use the System Restore utility together with existing restore points.
5. Click OK, and then click Restart.

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Step 2: Enable half of the services

1. Follow steps 1a and 1b to start the System Configuration utility.
2. Click the Services tab, and then click to select the Hide all Microsoft services check box.
3. Click to select half of the check boxes in the Service list.
4. Click OK, and then click Restart.

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Step 3: Determine whether the problem returns

If the problem still occurs, repeat step 1 and step 2. In step 2, click to clear half of the check boxes that you originally selected in the Service list.

If the problem does not occur, repeat step 1 and step 2. In step 2, select only half of the remaining check boxes that are cleared in the Service list. Repeat these steps until you have selected all the check boxes.

If only one service is selected in the Service list, and you still experience the problem, the selected service causes the problem. Go to step 6. If no service causes this problem, go to step 4.

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Step 4: Enable half of the Startup items

1. Perform a clean boot by repeating step 1.
2. Click the Startup tab, and then click to select half of the check boxes in the Startup Item list.
3. Click OK, and then click Restart.

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Step 5: Determine whether the problem returns

If the problem still occurs, repeat step 1 and step 4. In step 4, click to clear half of the check boxes that you originally selected in the Startup Item list.

If the problem does not occur, repeat step 1 and step 4. In step 4, select only half of the remaining check boxes that are cleared in the Startup Item list. Repeat these steps until you have selected all the check boxes.

If only one startup item is selected in the Startup Item list, and you still experience the problem, the startup item that is selected in the list is the service that is causing the problem. Go to step 6.

If no startup item causes this problem, a Microsoft service most likely causes the problem. To determine which Microsoft service may be causing the problem, repeat step 1 and step 2 without selecting the Hide all Microsoft services check box in either step.

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Step 6: Resolve the problem

After you determine the startup item or the service that causes the problem, contact the program manufacturer to determine whether the problem can be resolved. Or, run the System Configuration utility, and then click to clear the check box for the problem item.

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Step 7: Reset the computer to start as usual

After you have finished troubleshooting, follow these steps to reset the computer to start as usual:

1. Click Start
   
   , type msconfig.exe in the Start Search box, and then press ENTER.
   
   
   
   If you are prompted for an administrator password or for confirmation, type your password, or click Continue.
2. On the General tab, click the Normal Startup option, and then click OK.
3. When you are prompted to restart the computer, click Restart.
   

How to start the Windows Installer service when system services are not loaded

If you run a Setup program without starting the Windows Installer service, you may receive the following error message:

The Windows Installer service could not be accessed. Contact your support personnel to verify that the windows Installer service is properly registered.

The Windows Installer service does not start if you clear the Load system services check box in the System Configuration utility. To use the Windows Installer service when system services are not loaded, you must start the service manually. To do this, follow these steps:

1. Click Start
   
   , right-click Computer, and then click Manage.
   
   
   
   If you are prompted for an administrator password or for confirmation, type your password, or click Continue.
2. In the console tree, click Services and Applications, and then click Services.
3. In the details pane, right-click Windows Installer, and then click Start.

Solution of privious post (windows xp logouts immediatly after login)through Remote ragistry

Edit these values and type the correct path of shell :

Shell = explorer.exe
Userinit=X:\windows\system32\userinit.exe

NOTE: These files may also be deleted by spywares. You may need to extract them using Windows CD.

Steps for rectifying this problem:


Log on to a networked computer.
Run Regedit.exe
Point your cursor to HKEY_LOCAL_MACHINE
Select File > Connect Remote Registry
Type computer name (infected computer)
Navigate to the following location in registry of destination or infected computer


HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon


Edit these two values in right pane:

Shell
Userinit


Change these two values to
Shell=explorer.exe
Userinit = x:\windows\system32\userinit.exe
Exit from Registry
Restart Infected computer.
You should be able to log on to computer.
if it not work then go to back steps and just copy orwrite the file userinit.exe

worked successfully tested 100 percent guaranteed

Windows XP logout automatically

THIS SOLUTION WORKS 100%

Let me explain what happen with ur computer (why u cant login into ur windows account).

1) u got a virus
2) it copied itslef, or it made a copy simmilar name to itself into ur WINDOWS/system32
3) it cahnged the registry key: HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ WindowsNT \ CurrentVersion \ Winlogon, and instead "Userinit.exe", it wrote its name

So, heres an example:

1) u got a virus, for an example, "winupdate86.exe"
2) it made a copy inside system32 as "winlogon86.exe"
3) changed registry key, and in entry putted "winlogon86.exe"

So, ur computer actualy loged on via virus, all time until ur antivirus deleted it (after that u couldnt be able to login). After ur antivurs detected and removed the virus( both "winupdate86.exe" and "winlogon86.exe") ur windows continues to look for "winlogon86.exe", couse it is on current place in registry,and its all it knowsto look for, when it try to login.

So, to solve the problem u need to (SOLUTION!!!)

1) only way to recover ur login is to find a copy of "userinit.exe" file (from XP DVD, from another computer...)
2) rename it to be as name of virus u had (u maybe dont know it, couse ur antivirus deleted it, but if u know u llbe able to fix ur login). So, sopy of "userinit.exe" rename to "winlogon86.exe"
3) put new renamed copy into ur system32 (Ofc, u dont have windows on ur computer, couse u cant login, but ucan plug off hard disk and plugin it to another computer. Other solution is if u can make bottable USB or Floppy disk DOS, and use simple copy function. 3th solution is if u have another operative system on ur computer, and manage coping there)
4) login ur windows normaly (now after u tricked ur regystry key, it still looks for same entry when it login, which was name of virus. But trick is u made a copy of real userinit.exe, and renamed to trick registry)
5) find via regedit HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ WindowsNT \ , and instead name of virus, put "userinit.exe"

Thats all, ofc if u still have virus would be great if u write its name before ur Antivirus delete.. If u still know it, just do steps. If u dont know actual name of virus u can do steps, but not gonna help u. Couse u need to know whats written in entry HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ WindowsNT \ . I found alctual name of my antivirus in way I go to search files inside my WINDOWS folder. And after it finished, I sorted all files with Modified Date, and Created Date... I found all files of virus in my system32... Deleted them and I had this problem... but after I saw all u people worte here I knew how to fix. Ofc I was lucky cuz I before deleting them, made a carantine. So I knew names. And with another comuter fixed.