Well, it is a common problem, don't worry. Actually what happens when u place a new HDD is that Windows re-arrages the drive letter according to some proccedure, which names C as the active primary partition and then D as the primary partition in the next physical drive then goes to logical drives on the 1st HDD and so on. U don't have to worry about it. Actually in ur case it is not allowing u to change the position of the page file cause u are not able to log in. In most cases u will be ableto log in even ur page file is small, i.e. 2 MB which windows set by default in case the drive letter has changed or even removed. But u can do it remotely. How?! First u have to be a member of the Admin group of course. Type mmc at the command prompt and then Add/Remove Snap in then Add then choose Computer Management, click Add and when prompted choose the name of this workstation that u need to change the page file for. Then finish close and ok. Now right click on the left side of the mmc Computer Management and slect properties. When u do so then "Computer Management (Computer Name) Properties" appears showing General, Network Identification, and Advanced Tab. Now go to advanced and volia. Then Performance option and there u can choose where to put ur page file. The other pc has to be on to change the page file. After finishing restart the pc with the modified page file and it is back to life?.
PS: Next time try when changing HDD to set the page file to the boot partition cause this will never change. Later when u log in change it back to where u ever desire
