[computer-tech-support: 8394] partitions crowded in Windows 7 and a huge file

Hello,

A friend gave me a laptop (Dell Vostro 3300) with Windows both of them
with a Professional. At the time, it was not working, due to a
virus. I got rid of the virus and now the computer works.

There are three partitions, two of them with a "Windows" directory,
"Program Files", etc. (The third partition is not used; it is ready
for an alternative OS. There is NOT any OS option at bootup; it just
goes to Windows.)

I have very little experience with Windows 7. Can someone help me
figure out the answers to these questions:

1. How can I tell whether the machine is booting to the C: partition
or the D: partition?

2. Can I delete the "Windows" directory from the other (i.e. non-
boot) partition without causing a catastrophe?

3. The C: partition is 14 GB and it's crammed full. I'd like to
clear out some space. The biggest file is C:DELL/Image/Factory.wim .
That file is 5 GB !!! I don't know what that is for -- but if I don't
need it, that's the first file to get deleted. What is this file?

All answers and any other advice will be appreciated.

Ted Shoemaker

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