Right click onto your "C" drive & if the Windows.old folder is still there, you'll see it.
To get there. click onto that folder beside the Start icon, or near it. You may have to click onto Computer (options to the left). There, you'll see your partitions & can right click the Windows 8 partition & check. Once Windows 8.1 is up & running good, if this was an upgrade install from Windows 8, there's a Windows.old folder left behind. Unless it's already been deleted.
Still, you need to organize things better to maximize your space on your SSD. You have two 1TB HDD's installed too (according to Speccy), so start by creating folders that's like the ones on your OS on one. Especially Downloads, Documents, Pictures, Videos & Music folders, these are huge space hogs on a SSD. Move all of your downloads to the one on the HDD. Point your browser(s) to download in the newly created Downloads folder. Same with the other items, that is a ton of space you're using & I'd guess that most of it can be stored just as good (& safer) on the HDD. That way, should your SSD crash, or your OS gets infected, you have it stored off the OS drive.
Also, if you have System Restore enabled, disable it & delete all Restore Points. It's a waste on a SSD, plus System Restore is not a good substitute for backup, it's unreliable. Disable hibernation, another space hogger, that I see you have enabled. With a SSD, that CPU & 16GB RAM you can clean boot much faster than others "wakes up". To do this, type cmd in the Search box, right click, run as Administrator w/o the quotes "powercfg /h off" (copy/paste the command & press Enter). You'll be prompted to reboot, and will see the space savings begin.
And finally, with 16GB RAM, you do not need a 32GB pagefile (virtual memory). 1024MB is all you need (mine is 256MB for the sake of having it, with only 12GB installed RAM), if that, but you have to disable hibernation as above first. No wonder your SSD is so full. The majority of SSD users doesn't setup these things, and Windows will way over compensate, costing you precious space. Between System Restore (if enabled), hibernation & that massive page file, is a lot of wasted space.
Now to make that page file much more lower & where it needs to be. From the Control Panel, type in Performance in the Search box & Enter. There should be an Advanced System Settings to the left, click that. The Advanced Tab is where the Virtual Memory setting is. You should see it, normally it's pre-checked at the top to "Automatically manage paging file size for all drives" or similar wording. Uncheck this. Under "Drive" (make sure the volume that Windows 8.1 is on being selected), Click "Custom Size". There will be two boxes, a minimum and maximum size. Clear the amounts in these. Type 1024 in each. If you're uncomfortable with that, 2048MB, but no more & then Set, then there may be an additional option that says OK. You'll be required to reboot for the change.
Remember, I'm running fine with 256MB pagefile on less RAM than you. Even my notebooks with 8GB RAM only has 512MB pagefiles. This forces the RAM that you pay for to do it's job. MS's engineers are assuming that everyone are running portables, that they keep a huge load in RAM all the time & they need 2x that to sleep or hibernate. It's another example of MS making Windows 8 as an AIO type of OS & spending more time on the golf course & less on the job.
Too, you gain additional benefits from your computer performing full reboot & shutdown cycles, things in RAM are truly cleared. The way it is now, both Windows 8 & 8.1 users by default aren't shutting down their computers. MS is doing a nice job of making it's customers think so, but this is only a hybrid shutdown. Kind of like sleeping with one eye open & the other shut. That's also why certain components are reaching normal temps very fast, like in seconds. In a notebook, this certainly doesn't help long term battery life & MS will have to do a better job with the next release.
Honestly, I believe you'll save a lot more be disabling SR, hibernation & reducing pagefile than the finding & deletion of the Windows.old folder, if still there. If you want it for safe keeping, you can move the Windows.old folder to one of your HDD's, but it needs to be off the SSD (if still existing).
Hopefully this helps to explain where a lot of your space is. A lot of it.
Feel free to ask any questions if needed. You may also benefit from the reading of some SSD tutorials to keep these maintained. Physically, you need to do nothing except keep as much free space as possible, TRIM & Garbage Collection takes care of the rest. You do need to make certain that defrag is disabled for the SSD (even that TRIM pass described). Uncheck and defrag or "optimize" features on all partitions of your SSD. That's what it has a controller (firmware) for. You also need to shrink about 10% space from the right end (after you get all of the cleanup done).
And then let that PC run all night at the login screen. If you're around it, you may hear it rev up a bit, it's the controllers cleaning the SSD up & restoring your speed. Normally, one doesn't need to do this any longer, but in your case, being so full, you need to. Because you don't have the needed amount of free space for the controller to keep these things done at idle.
Good Luck & again, don't hesitate to ask questions. Fellow SSD users are more than willing to assist. You've got everything you need for a powerhouse PC, but the SSD at this time needs you to help it a bit. These don't need the TLC of years past, but you need to do your best to free all the space you can.
Edited by cat1092, 12 August 2014 - 01:05 AM.