My new high spec Dell running vista has just started taking forever to start up - 3 to 4 minutes. The screen is blank for 3 minutes, some I/O going on on the disk then finally starts up. It has been OK since I bought it a few months ago. I looked at the operational event viewer and there are 922 events, all Diagnostics Performance problems to do with Boot Performance Monitoring. It got worse after switching from wireless connection to my ADSL Router to hard wired connection using RJ45 cable. Any ideas what this is all about?