s:
Which Vista? 32 or 64 bit?
Which AntiVirus program? Which AntiSpyware program? Which firewall? What other [ if any ] computer security programs?
When did the system last work well? What changed?
Any chance you can install the updates 1 at a time; reboot; test?
Control panel > classic view > windows updates
view the installed updates
Have a look at
http://windows.microsoft.com/en-IN/w...alling-updates
Control panel > classic view > problem reports & solutions
What is listed there?
Control panel > admin tools > event viewer
On left, windows logs > applications
On left, windows logs > system
Look for errors.
Provide us w/ the details.
RF123