Hello,
This is not causing this start-up issue. There could be so many reasons for this, from faulty hardware, a dying hard disk, a file corruption etc. etc. etc.
Therefore, number 1 task:
Press the Start Orb and type "Event Viewer" in the search box. Click Event Viewer at the top. Under the summary of Administrative Events, see if anything to do with boot is listed under Critical or Error. Tell me of anything that might help me.
Richard