"Low disk space" but there is more than enough space!

[Space Case]

My situation is I have two drives... C: and D:  My C drive holds all of windows and is pretty much maxed out on memory usage. So, I put everything on my D drive such as games and programs because there is more than enough room there. I've changed my Environment Varaibles so that the TEMP and TMP go to my D:\temp  folder. When I try downloading a large file it will soon notify me that I have low disk space on my C: .
I know I have low disk space there and thats why I tried telling my comp to download files directly into my D: where there is room.
Am I doing something wrong or missing a step?

Windows XP
Sony Vaio.

[SuperDave]

When you download a file you should get a screen which allows you to select where you want it to download to. At least, that's what happens in my XP.

[Evil_Cronos]

Depending on the operating system you are operating, I know Vista does, the file from internet will first download to a temp folder on the main hard drive, in your case it seems as your C drive is your main drive. You just need to keep enough space on the drive to hold a little more than the file you are downloading. Try installing any programs that are currently on the C drive on your D drive, delete unused files, and/or run disk cleanup.

[patio]

Exactly how do you have these drives and partitions set up ? ?
How big is C: and how much free space etc. ? ?

[Broni]

Depending on the operating system you are operating, I know Vista does, the file from internet will first download to a temp folder

This is not true. It depends on your settings in your browser. You can set it up to any folder on any drive you want. If you use 3rd party download manager, you can set it up there.

[Broni]

I try downloading a large file it will soon notify me that I have low disk space on my C:

During download, Windows uses its temp folder to trace download, so if you're really low on C drive space, it'll display message like yours.
You have to remember, that for proper operation, Windows needs at least 10% (I believe) of a free space on a partition it's installed (C in your case).
You have to either free some space there, or use a tool like Partition Magic to juggle some space between C, and D.

[patio]

Exactly how do you have these drives and partitions set up ? ?
How big is C: and how much free space etc. ? ?

[Broni]

I know, I know...

[Space Case]

C:  Total Size  15 gb
     Free Space 765 MB

D:  Total Size 92.1 gb
      Free Space 45 gb

Environment Variables:

Variable                              Value
TEMP                                d:\temp
TMP                                  d:\temp

So... maybe my problem is I need the 10% free space on my C:? 

I'm going to try out this Partition Magic you speak of. I hope black magic works on my comp!

[Broni]

C:  Total Size  15 gb
     Free Space 765 MB

Too low....5%

maybe my problem is I need the 10% free space on my C:?

It looks like.