Local C Drive full when shouldn't be, Vista

[Quanza]

I'm trying to assist someone with this issue on their computer. She stated that her entire C drive went from manageable to full overnight. She could not tell me specific size before it went to full. The drive today shows 4.21 MB of 9.84 GB. Prior she deleted some things from the drive but it still continues to grow. As a matter of fact, a few moments ago the drive showed closer to 9 MB instead of the 4.21MB it's showing now.

Here's info on what she has:
Dell Inspiron 1525
Windows Vista Home Basic
Intel R Pentuim R Dual CPU T2390 @ 1.86 GHz
1.00 GB Installed Memory
32-bit OS
SP1 Build 6001
Total Physical Memory 0.99 GB
Available Physical Memory 282 MB
Total Virtual Memory 2.24 GB
Available Virtual Memory 1.30 GB


Her OS D drive is 55.3 GB free of 99.2 GB and doesn't seem to be getting any larger, though i just got the laptop from her last night.

I've selected to show hidden files and did not see any large files anywhere. This is ALL that I see:
Program file: 358 MB
ProgramData: 434 MB
Users: 72.8MB
Windows: Larger than 639MB

Defragmenter was initiated and froze at about 13%.
Disk Clean-up is showing only 30.9KB of available space to be had.
Also ran Dell Diagnostics and everything passed.
System Restore says no restore points have been created and prompts me to create a point, however when i attempt to do so, its says there's not enough room on the C drive and I was not sure if I should create it on the OS D drive or not.??


So that's about all I know to try off top. I can follow directions well if anyone can offer suggestions and steps to achieve them. If you require more info. and specs. please let me know and I'll send them right away.

Thanks in advance for any help offered!!

PS-By the end of typing this post she only has 3.92 MB remaining...

-Quanza

[Viceman]

Can you try to disable hibernation because this will get you back whatever your ram is so if you have 1 gb ram then you will gain 1 gb free space. Manually set your page file. If you have 1 gb of ram set page to a half gb. Go to sevices disable volumn shadow copy service. Trim down what you are indexing. This will get you enough space to get out of danger. Also, you should consider getting atleast 2 gb of ram for Vista, which is its minimum requirement.