Well of course all drives are turned off except for C. That's the OS drive and there are probably like three or four restore points saved. Even one restore point can use between 10-20GB of space, depending on what percent of space it's set to use. I'd recommend only keeping one restore point at a time saved and deleting the rest, IF you even need to use system restore. IF you're using something else to keep things backed up, turn it off on drive C too and delete all the restore points.
With 4GB of RAM I'd probably set the page file to 256mb minimum and 2GB max. That's plenty for something that rarely sees much space usage anyhow. The problem is, the system reserves a ton of space for virtual memory whether it ever uses it or not. You can check and change the page file settings as follows:
To delete all but the most recent restore point
1. Open Disk Cleanup by clicking the Start button Picture of the Start button. In the search box, type Disk Cleanup, and then, in the list of results, click Disk Cleanup.
2.If prompted, select the drive that you want to clean up, and then click OK.
3.In the Disk Cleanup for (drive letter) dialog box, click Clean up system files. Administrator permission required If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
4.If prompted, select the drive that you want to clean up, and then click OK.
5.Click the More Options tab, under System Restore and Shadow Copies, click Clean up.
6.In the Disk Cleanup dialog box, click Delete.
7.Click Delete Files, and then click OK.
Then go into Windows explorer, or my computer, and in the left hand navigation pane, click on your C: drive.
In the right hand column double click the Windows folder.
Navigate to the Temp folder and open it. Select everything inside that folder and right click then select delete.
Go to your recycle bin and empty it.
To check your virtual memory settings, do the following:
Open System by clicking the Start button Picture of the Start button, right-clicking Computer, and then clicking Properties.
2.In the left pane, click Advanced system settings. Administrator permission required If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
3.On the Advanced tab, under Performance, click Settings.
4.Click the Advanced tab, and then, under Virtual memory, click Change.
5.Clear the Automatically manage paging file size for all drives check box.
6.Under Drive [Volume Label], click the drive that contains the paging file you want to change, likely only C:.
7.Click Custom size, type a new size in megabytes in the Initial size (MB) or Maximum size (MB) box, click Set, and then click OK.
I recommend setting the minimum to 256MB and the max to 2GB. Don't forget to click the button that says "Set" after you make the changes, then OK, or it won't record the changes.
It probably wouldn't hurt to run disk cleanup either. Run the normal disk cleanup and then run the optional "cleanup system files" in addition, which is located on the same disk cleanup window and requires just clicking "clean up system files".
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