Laptop freezing

[#1]

Hey guys, I'm having a few problems and was wondering if anyone has any suggestions.  On Saturday my laptop refused to connect to my wireless network.  I have 2 AP's and it could see both of them, but just kept giving the message "Can not connect".  After a bit of playing it just started to work again.  On Monday it started to freeze.  Sometimes as soon as it boots, sometimes before it's even got to the log on screen.  Sometimes when it does log on it says it can't see the (in built) wireless adapter.
I had it running memtest86 all last night (12 times through the tests) and it didn't find a problem.
Anyone got any suggestions of what else to try?
Many thanks
Phil

[#2]

I would check the HDD, how old is it/what os are you running on it, is the wireless built in or a plug in card????





So many Questions, so little time

[#3]

Thanks Biker.  It's about 3-4 years.  It's an Acer Travelmate 4060.  I've got XP on it, and have done a full check of the HDD using the XP error checking tool.  The wireless is built in.  Any suggestions of decent (cheap/free) utils for checking HDD's?
Phil

[#4]

The HDD manufacturer usually offer a checking utility, I would start there.

[#5]

Good idea.  Never thought of that!  I've had it on since I posted my first post doing various diagnostics, and so far it's not frozen once!
Phil