C Drive almost full but TreeSize says about 25% free

Hello All!

System has been slow, so in the first instance I am looking at freeing up disk space.

OS says 120GB SSD C Drive has less than 6GB free so I emptied Recycle Bin (about 10GB) and restarted a few times but that made no difference.
TreeSizeFree seems to show of the 110GB available about 75GB used.

There seem to be just two restore points.

I would appreciate any tips on how to proceed with investigating what is using up space and getting more free space on the C Drive.

Thank you,
Nick
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Windows 7 Professional 64 bit
16GB RAM
C: 120GB SSD
D: 120GB SSD
E: 1800GB

Hi Nick,

looking at that report,

MAJOR
I see you have FRST, i know what it is, did you do the "cleaning" yourself or is it still ongoing at Bleep??
why, coz i still see the Quarenteen file with lots of data in it, they cleanup after completion
If it was just you then i would start a thread over there, its likely that whatever infection you had has not been cleared totally

Minor
See EaseUS, if you back up regularly with this i would drop system restore to just 1 point
Your 3 Program folders look excessively large

Thanks, Torchwood --

I guess I could get rid of some unnecessary programs.
But the thing I don't understand is that TreeSize adds up to a lot less than the OS thinks is being used.

Can't remember how I got advised about FRST...I thought it had completed.
I don't seem to have posted at bleeping computers but I can raise a topic with them now I guess.

hi Nick,

ms calculates gb size differently to everybody else its about 5-10% if i remember rightly.

i would definately go to bleepingcomputers, FRST is thier tool, and as theres over 200mb in quarentine something big an nasty hit you.

I have raised a thread at Bleeping and will see what they have to report.

Thank you.

Good news is, C drive now has 30GB free after going down to about 2GB for a day or two.

(The FRST files may have been left behind when I ran it from Downloads folder instead of its own folder. So I took Bleeping's advice and uninstalled it their way.)

As far as creating more space on C drive:
-- I did a disk cleanup of system files including Windows Update cleanup. That promised to return 20GB but I got back about 15GB that way.
-- I also manually removed an unnecessary media cache folder used by Adobe Lightroom 5 that had 4GB in it. Mysteriously, after that I had a further 12GB which seems odd.

If you got an infection, no matter what quarantine or any antivirus says, you MUST reformat to be sure to clear everything down. Failure to do so is a red flag.