Windows Explorer Keeps On Crashing

I'm lost...

I'm using Windows 7 Ultimate 64bit.
My Pc is up to date(windows updates) and I've used Winutilities to scan my registry.

My explorer.exe keeps on crashing. Just randomly it seems.
I don't even need to be doing anything particular.

I do have experience with pc in general as I'm a software developer.
I know you will require additional info, but i don't know what, so just leave a comment and I'll update.

Additional info

I think i should also mention that explorer is the only app that crashes on my pc.

The crash report i got now:

Description:
A problem caused this program to stop interacting with Windows.
   Problem signature:
  Problem Event Name:   AppHangB1
  Application Name: explorer.exe
  Application Version:  6.1.7600.16450
  Application Timestamp:    4aebab8d
  Hang Signature:   0a1b
  Hang Type:    16897
  OS Version:   6.1.7600.2.0.0.256.1
  Locale ID:    7177
  Additional Hang Signature 1:  0a1bdae38ae7300761c516c4416d992c
  Additional Hang Signature 2:  1c51
  Additional Hang Signature 3:  1c518a49cc7d37652d26c521e96f66c2
  Additional Hang Signature 4:  521e
  Additional Hang Signature 5:  521e607ec26a72aab4ae5a7126916ef3
  Additional Hang Signature 6:  e5e3
  Additional Hang Signature 7:  e5e3ca31dad607fa7b858ff5ea5c0fa9

Running scf /scannow returns: Windows Resource Protection did not find any integrity violations so no probs there

I finally ended up formatting..

Answer

It seems to me that Winutilities is the culprit,
And during some cleaning it may have cleared a registry entry and messed with explorer :S
Usually Explorer.exe is a bad to repair so:

1-If you can, restore registry entries from Winutilities usually these applications keep a backup somewhere.

2-Check system file Repair Windows 7 System Files with System File Checker

3-If this is not working you can try Through System Recovery Options at Boot from your Original Windows 7 Disk or any Windows 7 64bit Recovery Disk.

4-If this is not working and you want to keep your Settings,account,Appdata
you can try a Windows 7 installation repair

Thatś the best you can do before clean re-formatting