Win2003 Server drive is now uncompressed?

I woke up this morning, RDP'd into my server and noticed that my C:\ drive is now uncompressed. Last night it was about 90% compressed (I leave the SQL Server drives uncompressed).

Is this something that happens? How and why?
rcoastAsked:
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cmarandiConnect With a Mentor Commented:
Here are some questions:

- Do you have office communicator with voice enabled?

- Any scheduled tasks run at night? such as defrag or virus scan?

- You install anything new yesterday?  

- Any problems with the databases last night?

- Event viewer? Does it show anything from last night?
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rcoastAuthor Commented:
- Do you have office communicator with voice enabled?

No.

- Any scheduled tasks run at night? such as defrag or virus scan?

Yes. Defrag + Virus Scan.

- You install anything new yesterday?  

Nope.

- Any problems with the databases last night?

Nope.

- Event viewer? Does it show anything from last night?

Nope.
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cmarandiCommented:
Let's try something.  Let's compress the drive and not run the scheduled tasks.  I have read that some A/V programs uncompress a drive if they sense something on it.

So, compress drive... disable scheduled tasks and let's see if it stays compressed... we can then turn on the tasks one by one and see which is the culprit.
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