I am in need of some real microsoft experts here. I accidentally installed my new windows to a hard drive with the letter D. I've just customized it all after days of work doing this, only to realise that I can't just change back the drive letter to C and swap it with the other hard drive that my windows used to be on. (whoops, that was my plan). I can change the system drive letter via the registry method documented here, but obviously that renders windows unloadable and instead gives you a temporary limited state like this every time. My question is, can I then just boot from my windows 7 installation disc, and do a repair installation, which will modify my entire registry and ALL necessary system files/program files in windows that currently point to D, to point to C? Or will there still remain complicated problems inside the windows installation and so I will have to reinstall windows entirely? I REALLY want to see if this can work and save me another 4 days of work getting all my system and programs configuration all perfect again, so that's why I'm asking this. (And yeah really I must go back to C, D is not an option for what I need to do.) Thank you :)

First before I go spouting advise: Please make a snip of the 100% maximized output of diskmanagement and attach the snippet to your next post. A snip is made using the Snipping Tool which comes with Win 7. Save the snip as a PNG file. Let's see what I have for useful write-ups. HOW TO POST A SNAPSHOT OF DISK MANAGEMENT DISPLAY Run disk management: WIN | type DISKMGMT.MSC | ENTER WIN is the key with the wavy flag. Maximize the output of Disk Management: ALT-Spacebar key combo (this pops up a menu) | X key (selects Maximize) | Drag the field separators (such as between Status and Capacity) to show entire field. This is very important, otherwise, needed info is not visible. Make a snapshot: WIN | type SNIPPING | ENTER Click the New button. Drag the cursor around the area you want to snip. File | Save as | select save location and name | Save button Post the snapshot:

Thanks! image: http://dl.dropbox.com/u/6537900/misc/Capture.PNG

Can please post an attachment ot your next post here? Because I'm paranoid, I feel better about images i see here. OK. I give up. I can't find how one attaches a png to a post here. I've asked a question to this point. If the answer is that this can not be done, then Let me suggest your post in a forum which is NOT run by microsoft. I would recommend PC Help Forum, (www.pchelpforum.com) or SevenForums (www.sevenforums.com)

um, ok, never mind, this is my image and that is my dropbox folder, don't know why you can't trust that it's my image (I could easily find someone else's image on the net and then sade to computer and then attach it to a post here, in link form or however, and you wouldn't know, lawl) but since I'm not getting an answer I think I'll just have to completely reinstall windows then. (on the RIGHT drive letter). SIGH..... edit: thanks for reccomendation though....I'e asked on aother forum already though, and it seems this is an obscure matter that no one can answer i the time I have to decide...(another 5 hours)

Hello Frenchglen, No there isn't a way to change the OS drive letter once you have installed it. The drive lettering is used in many different locations within the OS, including but not limited to the many registry locations, shortcuts, symbolic links, other data repositories, junction points, etc). There isn't one place to change all the OS settings and possibly application specific settings to modify the drive lettering. When you do an upgrade most of the settings are retained as would be the drive lettering references so that would not help you. If the drive letter needs to change, the best way to do this is to clean installThanks, Darrell Gorter [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights. VAMT - Volume Activation Management Tool - Download link http://www.microsoft.com/downloads/details.aspx?FamilyID=ec7156d2-2864-49ee-bfcb-777b898ad582&displaylang=en

Thank you for sharing this information. I hope it serves others googling for an answer as I myself couldn't find a definitive answer despite extensive googling. I have since started to re-install the system. Once again many thanks.