Things to try:http://www.eventid.net
Apologies if any of this seems simplistic.Basic runarounds:
Firstly, defrag, then scan rigorously with updated malware & antivirus programmes. Is Windows up to date?
Can you use ALT + TAB when it freezes? Does CTRL + ALT + DEL work? If you can, check to see if anything is using a suspiciously large amount of CPU resource (discount system idle).
If it always happens with the browser open - reinstall the browser, or try a different browser altogether and see if the same thing happens. If teenagers use your machine, have they infested your browser with toolbars? Unload them all, checking to see if they exist in add/remove programs first
Check recently installed programs and software? There may be a conflict somewhere.
If you have a bunch of icons on the taskbar on the bottom right hand side, turn off what you don't need. If you load a bunch of stuff on boot, turn some of that off in msconfig (scanners, camera software, In CD, iTunes etc).
How old is the machine? I know this may sound ridiculous but have you tried a different mouse or if it is a usb mouse, used it in a different port?
UNPLUG FIRST!!! If it is an older machine + you know how, have you tried swapping your ram chip(s) or moving slots etc? Is anything getting hot inside it? After a freeze, if you take the side cover off, is the hdd, cpu or power supply getting overly hot?
It may help more knowledgeable posters if you include a description of the machine, operating system version, recently added hardware etc.
Edited by thirdkray, 27 April 2011 - 04:40 AM.