well i can tell you that i have had no problems with avg, as long as i tell it to allow things. but you already did that... try disabling avg. see that helps. normally avg is good for not being super intrusive. that being said, you said your pc froze. do you have any pre-existing issues that may be causing this on you. also, make sure that all your directories are full and complete. double check. i couldn't get guiminer to work with cgminer until fixing the directory myself. still prefer poclbm to cgminer... worked without a hitch for me.
try bfgminer as well, i just started dicking around with it and while it is in console command, it isnt that hard to use so far, just need a bit of a guide for it. ill be doing that today myself, so i can share links later with you if you like.

as for your logfile. sorry bud, cant help ya there, but once you google the windows error with guiminer attached to your search "gui miner (windows error)" im sure you should be able to find something if your determined to stick with guiminer.

good luck.