How come W7 laptop suddenly got more HD space

Microsoft Windows 7 home premium
July 5, 2010 at 13:09:11
Specs: Windows 7, N/A
I have an HP Windows 7 Laptop which used to have Vista before I installed W7 over it about 9 months ago. (if that makes any difference)

I went to see how much space I have on my C: drive and I knew it would be under the 135GB free mark after I downloaded some stuff. To my surprise and horror, I now suddenly have 174GB free. In other words, I gained about 40GB without deleting a scratch of files. I'd please ask to not have comments like "well, you have more space now, whats the problem?" This amount of space doesn't come from nowhere, and I believe something very bad has happened.

This is really freaking me out, I'd really appreciate any help anyone could provide.
(I don't want to bias the answers given, but I will post additional information after some posts)

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July 5, 2010 at 13:28:51
Did u install win 7 from scratch or upgrade? I suspect u have delete restore partition. Use disk management to check full capacity of hdd.

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July 5, 2010 at 14:08:27
Thanks for the reply.
I upgraded with the kit they sent out to applicable laptops that were bought within the timeframe they made. I did not clean install, just upgraded.

The thing is, I have had Windows 7 on this laptop for quite some time now. and I haven't seen anything like this in all the time I had it, as well I haven't deleted anything recently.

I know that Vista was a real pig on that restore stuff, and I think that it was taking up a good 50gb onwards into Windows 7 for me (it think it decreased a good amount though) which makes me think that could be the only thing possible with such a gross gain of space such as 40GB.

The thing I left out is that I had a virus, which I'm guessing Kaspersky caught because it is showing no active threats, but I spybot S&D's my computer afterwards as well, and it just gave some cookies that I deleted.
Could this virus have possibly done this?

And where is disk management?

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July 5, 2010 at 14:39:45
"and where is disk management"
click start>run or win key + r then type diskmgmt.msc and hit ok.
I don't think it is virus. Better check hdd full capacity first.

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July 5, 2010 at 18:03:23
Ok I found the spot, but what do I do from here?

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September 13, 2010 at 08:45:06
Did you ever figure out what happened? The same thing just happened to me - from 9.4 GB free to 46.4 free, without deleting anything... Music, photos still there - so what did I lose? It's scary!

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