Make sure you have updated your PC from Microsoft update and if you have already done so and the crashes are occurring there could be a startup program or service causing the problem including Java or Flash.
If the problem is Java or Flash (disable or uninstall to see) it needs a new version installed or the problem troubleshooted. If not Java or flash lets try a clean boot:
Click Start / run / type msconfig
/ enter / click continue on the User Account Control (If prompted) / click Selective startup /uncheck Load startup items / Click the Services tab / check the Hide all Microsoft services box / click Disable all / click OK / click Restart Now
See if you still get the same crash in IE and Firefox. If not then you just have to identify which service/startup item was causing the problem.
Start / run / msconfig
/ entter / continue on the User Account Control (If prompted) / services tab / check the Hide all Microsoft services box / check (Enable) the top half of the service boxes / OK / check restart now.
See if the crash problem is gone. If so the services you enabled are good to stay.
Repeat the enabling process for half of the remaining disabled services and continue this process until the problem returns or all services are enabled. If the problem returns then you will need to test the last batch of services you enabled one by one to find which was causing the problem to occur.
Repeat the same procedure for startup programs by disabling all in msconfig and then enabling some until the problem occurs. Your basicly trying to isolate the program or service causing the problem
If the problem is a service or startup program, you need to identify which service/startup item causes the problem. You will need to either disable/uninstall/update the program to avoid further problems.
Edited by Lee, 04 November 2012 - 05:26 PM.