Where is the solution?
I have a Dell Inspiron N 5010 Core I 3 and then was OK on Windows 7 (32) And then began to wait after the Windows boot screen And wait a period of about 2 minutes on the Welcome screen and log on I tried to re-install windows 7 , install antivirus Kaspersky with making update but it didn't find any virus,  I tried to re-install another version of windows, but to no avail with the knowledge that but after starting windows no problem has appeared   what Can I do?  
Dell Inspiron N 5010 is Waiting during Welcome Screen and log on Screen in 
windows 7 32bit