Changing Default Installation Path?

Hey, its the new guy again. I recently bought a 320gb hard drive and formatted it but the letter thats assigned to the drive is J: , not the standard C:
The issue I'm having is when I try to install drivers or the flash plugin it says that I must have free space on my disk. Clearly I have the space and its trying to install it into my C: which is one of my removable drives. I tried going into the disk manager and changing the letter assigned to the drive but its not letting me change it.

Does anyone have any ideas? When I originally installed windows I had it set to Jumper, not master. Does that matter?

 

Have you gone through the steps in this artilce for assigning and re assigning the drive letters.

http://support.microsoft.com/kb/307844

 

I found this article that sounds like a similar situation like you are experiencing

http://support.microsoft.com/kb/316505

 

I found out how to do it. I'm sorry I didn't reply earlier. I attempted to change the letter assignment through disk manager but it wouldn't let me because it was my boot drive. So instead I went to command prompt and typed "subst C: for J:/" and it worked. Mind you every time I want to install something that doesn't give you the option for a destination, or doesn't find the default as J:/, and I haven't used command prompt since I last booted my computer, then it wont install. Just an extra step on occasion. The next time I wipe my computer I'll change it to C:/. I've installed too much and have way too many updates to wipe it now and correct the error.