Help! 
Since I first installed windows 7, I've encountered countless problems, some small, some rather more large and annoying. At first I thought it was just the installation, so I did a clean install to see if it would fix the problems.
It doesnt seem to have worked
I still get varying problems and Im at wits end. Could it be a hardware problem or maybe a program i have installed? Or maybe Im just stupidly unlucky 
Here's a list of problems I've had:
Failing to boot into windows at all
Windows logon errors, not allowing me to type password at log on etc
No display after returning from sleep mode, although computer is on
App crashes for several programs - on one occassion most stopped working at the same time, sometimes its only the one eg. itunes
Anti virus not starting properly and forgetting virus/spyware databases
No sound, at all
Games seemingly installing correctly, but then giving "has stopped working" message on launch
...and several others
Do any of these issues sound familiar to anyone? Some of the above I have only encountered on the first windows installation, whereas others seem to keep coming back, no matter what I do. Using windows' image recovery fixes almost all problems I've had but it doesnt stop them from coming back and obviously I'd rather not have to do this everytime I encounter a problem.
Am I being dumb here? Everything seems to work fine for weeks and then suddenly problems appear from nowhere..
Im using windows 7 home premium 64bit and using AVG 2011 if that helps. I can also post my computer specs if they are needed.
Any help is MUCH appreciated.
Cheers

Since I first installed windows 7, I've encountered countless problems, some small, some rather more large and annoying. At first I thought it was just the installation, so I did a clean install to see if it would fix the problems.
It doesnt seem to have worked


Here's a list of problems I've had:
Failing to boot into windows at all
Windows logon errors, not allowing me to type password at log on etc
No display after returning from sleep mode, although computer is on
App crashes for several programs - on one occassion most stopped working at the same time, sometimes its only the one eg. itunes
Anti virus not starting properly and forgetting virus/spyware databases
No sound, at all
Games seemingly installing correctly, but then giving "has stopped working" message on launch
...and several others
Do any of these issues sound familiar to anyone? Some of the above I have only encountered on the first windows installation, whereas others seem to keep coming back, no matter what I do. Using windows' image recovery fixes almost all problems I've had but it doesnt stop them from coming back and obviously I'd rather not have to do this everytime I encounter a problem.
Am I being dumb here? Everything seems to work fine for weeks and then suddenly problems appear from nowhere..
Im using windows 7 home premium 64bit and using AVG 2011 if that helps. I can also post my computer specs if they are needed.
Any help is MUCH appreciated.
Cheers