Right at first look it seems to have cleared another 4%, which as your finding helps, but it still needs a lot more to make a real difference, odds are you can uninstall far more than you think you can, but we don't know what you use, so it wont be easy saying what to remove, and I'm not sure if the pit test picks up all installed items in it's scan, so lets nibble away and see what we can find.
Browsers and toolbars, not massive space hogs, but could impact on performance if running, often these get installed as part as another install, you have to look out for check boxes when installing, and adjust any\all boxes appropriately, so you only install what you need, I suggest using Revo to uninstall (free version), it removes junk that can get left behind from a normal uninstall, so install and launch this, it will display your installed programs, double click on any entry you want to remove, and follow onscreen prompts.
Main thing to note about this is it starts by creating a restore point, it then launches the programs own uninstaller (where possible), use that to uninstall first, then if prompted by the programs own uninstaller to reboot to finish the uninstall, deny that, select to reboot later (not all programs do this), then continue with Revo, click Scan, then when it lists files left behind (there are times nothing is left behind so just close) select all, then delete, sometimes you get another screen doing the same when you move on, repeat if needed, then your done, move onto the next one, or close it when done.
So lets start with the toolbars etc. I mentioned above, the biggest offenders I see are Ask, Bing and Yahoo, and Chrome (Google browser) is common as well, but there are many more, so unless you are actually using these they are all safe to remove, just do them 1 at a time, but do NOT remove the Avast add-on, it is a simple traffic light to good and bad on your browser, and when used helps to warn of bad sites.
Now Java, the latest version is
Java v7 Update 13, go and update to this, then when done go into Revo, and look for any other Java versions, currently you have 2 I can see (Java 7 Update 11 & Java™ 6 Update 22), it's possible installing the latest it will auto remove those, but if it doesn't, remove them yourself, just keep this latest version.
Burning software, you have 2 that I see, Roxio and Nero, the question is do you do much burning (CD's or DVD's) ?
If so which software do you use, if you use just one of these, then it's safe to remove the other one.
Media, do you use iTunes or QuickTime, and any associated extras they now push on people such as cloud etc. ?
Any or all of these are safe to remove as long as you are not using them.
There is 1 major factor, which I have only just picked up on, and that's your using Vista ?
I was always going to address system restore at a later point, I was working to get you some normality first and wanted to save this incase it was needed to restore to an earlier stage, but now I have picked up it's a Vista system, this needs to be addressed 1st, it is a massive affect on the drive space, as it uses 15% of the drive for it's own use, the recommended is around 2% or 3% of the drive, but small drives just don't have that much space to give, so lets sort that before doing the above, this should hopefully give an instant result.
Main point to note before staring this, it will wipe out all restore points, so the first job after this is to create a fresh restore point.
To see how much you are currently using you need to click Start - Programs - Accessories, now look for Command Prompt, right click on top of it, then select Run as Admin (allow any prompts), this will launch a black DOS window, the safest way to proceed is via copy and paste, it removes the risk of typo's, so copy the following line, then right click in the black window, and select Paste, then hit Enter, this will give a summary of what your currently dealing with, I'm guessing between around 9gig to 24gig.
vssadmin list shadowstorage
Now we need to repeat that with the following line instead, this will instruct what the size allowed is to be, lets say 3gig, if you want a bit more then go to 4gig, just edit the number appropriately.
vssadmin resize shadowstorage /on=C: /for=C: /maxsize=3GB
You can rerun the first line again after if you wish, it should simply confirm that it is set to the new size, but be aware, doing this reduces the amount of time you can go back to if you have problems, as it removes the oldest points as it needs more space for new points, so to exaggerate the point, you would only be able to restore to the last few days, as opposed to the last few months, it wont be as noticeable as that sounds, but in essence that's what it means doing this so your aware.
Now the hard drive, that's beginning to bother me lol, going by the Pit scan it only seems to be maybe 80gig at best totalling and converting the numbers shown, mind you I could simply be getting that wrong somewhere, but going on the drive make\model it's supposed to be 160gig, so I suggest getting and running
TreeSize Free, then take a screenshot of the result, and paste that back here when your done, it will give a breakdown of the drives directory and show where the space is being used.
To take a screenshot simply press and hold the Alt button (next to space bar, it only copies the main image, not the entire desktop) then hit the Print SCRN button, it's normally found around the Del button, possibly above and slightly right, you will NOT get ANY notice of it having done this, but just open Paint, then click on Paste, that should place the image into that which you will then be able to see, from there select to Save As, then give it any name you want, but most importantly save as a .jpg file, use the drop down box if required to select this extension, otherwise you may not be able to upload it here.
Sorry for so much writing, it's important you know what doing certain things can mean, giving you the choice to raise any concerns you may have before you do each bit, and it will also help highlight things for the future as well, see how this goes, then we can see what to try next.
*edit
Forgot the Revo link lol.