Windows 7: No more C: drive space

you'll open up 26GB on your C drive if you relocate iphone backups to another drive

Storing your iPhone Backups on an Alternate Location iMazing Support

Backup an iPhone or iPad to an external drive, or another location

also recommend ccleaner
CCleaner - Free Download or try CCleaner Professional - Piriform

and doing this
Disk Cleanup : Extended - Windows 7 Help Forums

Thanks. I'll do that

@ebuzz. As has been suggested you can save 12 gb by disabling Hiberfile, probably 12 gb by reducing the Pagefile from 15 gb down to 1 or 2 gb, as you have a SSD & 16 gb of RAM, as then you can save another 26 gb by relocating your iphone files as suggested by johnhoh. All up you could save about 50 gb, plus what you might also save by running Ccleaner & Windows Disc Clean up.

What you can save:
12 gb from the hiberfile
12 gb by reducing the pagefile size
26 gb relocating iphone files
50 gb total. Plus what you might gain from Ccleaner & Disc clean up.

As your current C drive is 125 gb, this means you probably could gain nearly half of it capacity again.

I have 32 GB on my laptop and its pretty tough. i usually use the cleaning tool on control panel to clean some stuff and i also using an app called Treesizefree to see which one is eating my system.

Yes a Clean Install will format the partition or drive and you will loose your data.

Before doing a Clean Install you back up what you want to save to a external drive.
Programs in my opinion should be cleaned installed on your new install of Windows 7.
Once you have completed the Clean Install of Windows 7 and wanted programs I would make a backup or a clone of the new install of the Drive/Partition to a external drive.
Tuck that backup/clone away in a safe place.

I use Macrium Reflect to do all backup's and clones.

Macrium Reflect Free | Macrium Software

If you desire you could use the paid for version.

Macrium Software |

Jack

Ok, I managed to move the iTunes backup to another drive.
I disabled the hiberfile so that freed up room;
Also, I cant set the page file to less than 16mb? Why?

"...Also, I cant set the page file to less than 16mb? Why?" You might want to leave the pagefile alone awhile, let the dust settle somewhat from the other changes. There is a "manual over-ride" within Windows 7 that normally allows a person to set the page file size. However, be forewarned, too large or too small a page file could affect Windows 7 performance smoothness. Maybe check with Microsoft support or KB articles about page file operations before making a major change.

Ok, I managed to get up 39.7 GB, so that should be ok for a while!!

what exactly happens when you try to change the page file size? ( don't forget to click "set")

btw since i first went to 16gb ram 10 years ago i've always disabled the page file on six different systems any never had an issue.

First I have to change the setting from Automatically manage page file size for all drives to - custom
Then a message pops up saying
"The initial page file size must be between 16 and 1677126...MB and cannot exceed the amount of free space on the drive you selected."

There's also a statement at the bottom of the Virtual memory window that the min allowed is 16mb