welcome to win7
where everything looks sexy xD
as for gpu drivers i found that usually they were upto date or the one just before so i always just installed from the manufacturers website to make sure
seeing as i use rivatuner, sometimes i need to use a beta driver as the main one is incompatible so yea. website is ya best bet as think the windows update lags behind a bit so might be a few weeks before it picks up the new update.
as for the hard drive... a bit more info is needed, was it a brand new drive? sata/ide? have you checked the connections? dont mean to sound patronising with my suggestion but when i did a rebuild before i was stumped for about 20 mins as to why i couldnt see a hard drive but i hadn't pushed the sata power in all the way... and boy did i seem stupid
it's possible its not active in windows but still present, can you see it listed in the bios/start up post screen?
can check if its in the device manager... go to <START> and type in "device manager" in the search and it should be listed, open it up and look in the "disk drives" subsection
failing that you cant see device manager go to START>CONTROL PANEL>SYSTEM>DEVICE MANAGER
another option is to go to the start menu again and sear for "disk management" and open that program. i remember some drives you would have to activate and create a volume before "my computer" would be able to see them... and this is where you do it. in here if all is connected you should see:
c:
system reserve
<your other drive which you are looking for>
or something to that extent. now in here it will tell you the current status of the drive in question.
in the lower section it should have DISK0 with the sys res, and c: block chunks next to it stating what the partitions are for i.e. primary partition, boot etc etc and should say healthy
below you should see DISK1 which will be your missing drive and it might say something like "unallocated volume" or something to that extent. again this depends if you have data on there or if it's a new drive... pretty much this is only for a new drive that has not been given a volume. so if it is an empty drive you can go ahead with formatting it to NTFS and then activating the drive, might take sometime to go through depending on your disk size. but then it should become visible in "My Computer".
hope you were able to follow this and that it was of some help
let me know if ya ave any probs or the status of the drive