C: drive disk space decreasing?

i am using vista home premium

my C: drive disk space is decreasing even though i never install anything

why is that so?

Welcome
More than even odds that its shadow copies
To find out for sure download windirstat and see everything that is on your hard drive.
http://www.mydigitallife.info/how-to-fix-shrinking-disk-space-in-vista/
http://windirstat.info/

shadow copies...hmm.

so what is the next step after i download windirstat and see what is on my hard drive?

thanks

You analyze windirstat, anything that is not needed or wanted can be removed.
May I also suggest ccleaner, to clean up a lot, really a lot of crap. Just do not check that you want to check registry items.
http://www.vistax64.com/tutorials/76227-system-restore-disk-space.html

thanks a lot for your help

Your kind of quick with the mouse. I think that I added a lot before you answered. Check my posts, again and good luck

yes i am looking at the links now. i downloaded WinDirStat and it has already finish searching. now i am analyzing them

I have windirstat, Im sure that you will like it.

there are so many files which are unknown to me. that is surprising

If you want to restore a lot of space. Use ccleaner to delete all but the last restore point, it may be needed in the future. Then look at windirstat, again. Ccleaner will delete all your cookies, unless you make an intelligent scan first, and you will have to sign in again to your webpages etc.

i see. thanks for the help and knowledge. learnt a lot

My Job is done, I see a smiley. But, if you have any other questions, just post. If Im not here, our membership will help just as quickly.

Also, here's an excerpt from a cool article I recently found for freeing up space like you want:
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Now here are some commands that you could use in the Command Prompt console in administrator mode in order to view and resize the space allocated for SVI (System Volume Information, related to System Resotre):

1. To see the space allocated and used for SVI:

- Open Command Prompt with “Run as Administrator” option

- Type in: vssadmin list shadowstorage

- You will see Used Space, Allocated Space and Maximum Space for SVI

2. To see the restore information stored therein:

- Use in the same console command: vssadmin list shadows

3. To resize the maximum allocated space:

- Type in command: vssadmin resize shadowstorage /on=[here add the drive letter]: /For=[here add the drive letter]:

/Maxsize=[here add the maximum size]

- E.g., vssadmin resize shadowstorage /For=C: /On=C: /MaxSize=10GB

- You will see a prompt confirming resize done

- You can check the status again using the command discussed in point 1 above
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Just be careful, I'd say don't resize it below 10GB in order to make sure it doesn't mess up your most recent Restore Point, because if you go lower and it get deleted, it'll suck if you end up needing one.

Also, I recommend just copying that command right into command prompt, because it kept saying "invalid command" when I tried to type it out myself, even though I could have sworn it was exactly the same. I think part of it might be case sensitive or something. Anyway. Hope this helps someone, it's nice for me to be able to see exactly how much space is being sucked up by restore points, and be able to reclaim that space at my leisure. Saved myself 30 gig.