Windows 7 hangs after logon

I was unfortunately not able to find any specific information about this problem you are experiencing, sorry. Here is a link to a forum that may be worth navigating.
http://social.technet.microsoft.com/Search/en-US/?query=Windows%207%20hangs%20after%20logon&ac=8
 

moshe_or,
I have been experiencing 'hangs' since I installed WIN7 a couple of weeks ago - and I think the problem is that I didn't install it on a powerful enough computer (an older box I use for Vista and the Vista runs just fine).

You say you 'upgraded'. Do you mean that you did NOT select the dual-boot and that now your only OS is WIN7?

I hope that is not true.

If you have dual-boot, can you boot into Vista?

I did an in place upgrade (I do have an image backup),NOT dual boot, and i will role it back if this Q thread fails or I will not find a solution my self.

Not to criticise but for future reference. Never upgrade to a Beta version of anything. The Beta does not include any support there of regardless, as it is a Beta, incomplete version.

I agree with Michael I would strongly reccomend against any microsoft upgrade, In my experience upgrades take issues along with them and can cause massive problems in the long run. Best practice for any new OS install is a clean load. You may well have software that was installed with vista that is trying to run at startup that is not compatible with windows 7. You could try an MSconfig within safe mode and try to disable anything that doesn't come from microsoft. Also you may have a vista driver inplace of a 7 driver.  If you have an image of the old OS why not try a clean load of 7. Also the hardware you are using may have an impact on the problems you are having.