Chances are good that your user profile is corrupt (which is why you can't login and it fails to load). This could also be the source of your other problems (though that is unliely).
To fix this use http://windows.microsoft.com/en-AU/windows-vista/Fix-a-corrupted-user-profile.
If that is the only available Administrator Profile (you need to be an administrator to fix this), enable the Hidden Administrator Account (HAA) using
http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?&lang=en&cr=US&guid=&sloc=en-us&dg=microsoft.public.windows.vista.administration\_accounts\_passwords&p=1&tid=d20f9db4-7b2c-48be-a087-7835dc2a9055&mid=d20f9db4-7b2c-48be-a087-7835dc2a9055.
If you can't remember the password, try nothing as that's probably what you (or the vendor) did during installation. Once done, be sure to deactivate the HAA to save it in case it's needed again and for security purposes (since people often try to hack into
systems using this account). Do NOT use the HAA as your administrator account because if you lose the only administrator account on the system or it becomes corrupt again then you are hosed.
Good luck and I hope this helps.
Have you tried deactivating the Windows Firewall to see if this resolves the problem (I assume you have no other firewall running on your system {including not one from Trend Micro which I believe includes one in it's suite) and you don't need one - Windows
Firewall is a perferctly adequate product - if you do you should either deactivate it or uninstall it). On its own, having two firewalls running at the same time could cause any number of problems including some of those you're enduring.
Do you know when this problem began? Try a System Restore to a point in time
BEFORE the problem began. Here's the procedure: http://www.howtogeek.com/howto/windows-vista/using-windows-vista-system-restore/.
Be sure to check the box to show more than 5 days of restore points. If the first attempt fails, then try an earlier point or two. NOTE: You will have to re-install any software and updates you installed between now and the restore point, but you can use
Windows Update for the updates.
If the System Restore doesn't work, do a Startup Repair by booting to the genuine Windows Vista Installation Disk (or one you can borrow from ANYONE) or from a Recovery Disk. Here's the procedure:
http://www.bleepingcomputer.com/tutorials/tutorial148.html.
To boot to the CD you may need to change the BIOS to make the CD-drive first in the boot sequence. To do that, wait for the screen that tells you the F key to push to access the boot menu or boot setup. Push it quickly. Make the changes, save your work,
and exit. Put the CD in the drive and reboot. When prompted, push any key to boot from the CD.
If you don't have either disk, you can make a bootable Recovery Disk using
http://neosmart.net/blog/2008/windows-vista-recovery-disc-download/ along
with burning software like: http://www.snapfiles.com/get/active-isoburner.html and,
of course, a blank CD.
If that doesn't work, then please post any repeating error messages from the Event Viewer concerning the base filter
engine service (Start / Control Panel / Administrative Tools / Event Viewer – or typing eventvwr from the command prompt). Here's how to use Event Viewer:
http://www.bleepingcomputer.com/forums/topic40108.html.
Post any relevant entries here so we can review them.
If that doesn't work, we'll need to do a system repair/upgrade using the genuine Windows Vista Installation Disk (one you own or one you can borrow from ANYONE). Here's the procedure:
http://www.vistax64.com/tutorials/88236-repair-install-vista.html.
Although this will not affect your data, settings, or programs, you should still backup your data before starting just to be on the safe side. If the other procedures don't work, THIS one is almost certain to work. You may have a lot of updates to re-install
(including any service packs you had to remove). If the version on the system came with SP1 or SP2 pre-installed and the disk is an earlier version, then you'll need to make a slipstream disk as follows:
http://www.vistax64.com/tutorials/151606-vista-sp1-slipstream-installation-dvd.html.
Hopefully one of these procedures will resolve your problem. If not, post back and we'll try something else. Post back in any case so we'll know how it turned out.
Good luck!
Lorien - One - MCSE/MCSA/Network+/A+
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