Problem with Windows at Startup

I have Vista Ultimate and am connected to Windows Small Business Server 2003

through a domain. I have two computers that this same issue is happening on.

Both computers are identical. When I begin windows, the sidebar does not

load properly. The space where the sidebar should be is slightly blurry and

the plus symbol and left and right arrows at the top appear. After giving it

a few seconds, I try to click on the sidebar and it says that the program is

not responding and if I want to wait or close it. If I close it and try to

reopen it, it does the same thing. In addition, Microsoft Word will not load

on either computer. Excel works fine. Outlook works fine, but if I try to

open an email with a graphic, it crashes too. It won't respond and then asks

if I want to close it. AutoCAD also doesn't work when this happens. This

leads to me to believe that something is not loading properly at startup

since so many seemingly unrelated things are occurring. The strange thing is

that if I reboot (it may work on the first reboot or it may take 10 reboots),

the computer will eventually load correctly and all the programs work as they

should.

This started happening on Aug 30 after I installed the following five

updates: KB933360, KB938194, KB938952, KB938979, KB939159. I have tried

uninstalling all five updates, but the problem didn't go away. On Sept 12, I

installed Update KB905866, so my computer is supposed to be up to date.

I have tried disabling Sidebar at startup, but that doesn't solve it. The

other programs still won't work and if I try to start the sidebar, the same

thing happens.

Thank you for any suggestions. It is a major hassle to have to spend 15-30

minutes rebooting my computer every time I turn it on.