Resolving a start up problem. Advice needed

Hi,

This is my first posting so hello to All and apologies if this is in the wrong section. I have a rather odd problem with an HP Pavilion G6 laptop, with Windows 7 Home Premium edition.

When starting up it sometimes hangs after the windows logo, turns to a black screen with cursor only and goes no further. I can start in safe mode when I reboot and a repair clears the problem. The bizarre thing is, it does not do it all the time and can go through 2 or 3 reboots before happening again. Also, it sometimes hangs and if I reboot it seems to clear and loads correctly but other times I have to perform the repair process for it to clear.

I have tried all the usual tricks like switching off anti virus, making sure drivers are up to date, minimum start up programes etc.

Any help appreciated.

Thanks Golden, just performed the scannow and no integrity violations.

Ok, I have loaded Soluto, I am looking at 'frustrations'. It lists Internet explorer, Net runtime, Windows problem, catalyst control, magic desktop and HP setup. Other than that, all I can see that is relevant is 'a lot of time wasted due to PC reboots and application crashes'.

In addition work through these Troubleshooting Steps for Windows 7 to establish a Clean Boot, comb the logs for clues, use the System Resources to check for probs and solutions.

If nothing gets resolved after completing the steps consider Gathering a Startup, Shutdown, Sleep, Hibernate, or Reboot Trace - Windows 7 Forums

Have you tried msconfig and turned off every weird startup program and service?
Also go to C:\Windows\Prefetch and delete all the files in the Prefetch folder.
Restart PC.

Have you tried these steps?
Why is my screen black when I start Windows 7?

Thanks for all the help, I eventually did a full backup and reinstalled to factory state. After trying everything, including stripping all programes and removing most downloaded items, I was still having problems.
It'll forever remain a mystery!