Buying is not an option.
Windows installations from 7 onward have been upwards of 20-25GB, and that's just your system files. You can try to uninstall as many unneeded programs as you can, but I don't think you'd even end up with 50GB of free space even if you uninstalled every possible program that isn't essential and deleted every bit of non-system related data.
If you open up your Control Panel, or even just type "Programs & Features" into the start menu, you'll get a list of the programs installed on your computer and how much space they're taking up.
Really, the best solution is to replace or add another hard drive. Using a drive that small as both your system drive and data drive is probably not a good idea. Your PC performance suffers once you've only got a few GB for Windows to use for caching/swap files.
Your hard drive is alliteratively small. Many people are suggesting an external drive which would do the job. But for convenience I would recommend replacing or adding another hard drive. This is easily done in a desktop computer but a laptop is also fairly simple. Most laptops have a cover on the bottom you can remove to access the hard drive, from there just replace it with another 2.5 inch drive. You can also add a second if you have am optical drive that you don't use. I replaced my DVD player in my old laptop using a universal hard drive caddy and a hard drive. Since it is a one size fits all caddy it doesn't look perfect but I dont care about aesthetics.
Because hard drives are so cheap, it would be better for you to just go out and get a $50 hard drive which would hold about 500GB to 1TB. It's a very simple thing to install an internal hard drive. Just plug it into one of the hard drive slots, plug in a power cord which is a keyed fit therefore you can't accidentally use the wrong plug or plug it in the wrong way. Then just format the drive and that's it. If you want to free up space on your 75GB drive, just delete software which you have the installation disk such as Microsoft Office, games, etc.. Then reinstall those apps onto your new drive. You must use the control panel to delete files. What you definitely don't want to do is start deleting files and folders containing programs because this will screw up your file system However, you can definitely just delete folders containing files such word documents, pdf files, photos and the like to free up space if you're not going to get a new hard drive. Otherwise, if you do get one, just cut (Ctrl + X) the files and paste (Ctrl + V) them into your new hard drive.
If you just needed an extra GB or two, then you could probably get it by just downloading Ccleaner and run it to free up space. Ccleaner does this primarily by deleting your internet cache which can be a lot of junk data.
But freeing up 10GB is going to require the deletion of a bunch of stuff. Go into the control panel and click on the icon for showing the programs on your computer. On Win7 it's called Programs & Features. Go through the list and delete anything that you don't use anymore. If you're unsure of what a specific program is, or if it's safe to delete it, just do a web search for it. Most of what you'll see are programs that you installed and not special apps/programs that are critical to the safe and reliable workings of the computer.
Deleting games will free up a lot of space, but generally only about 1 GB per game.
When in the control panel's Program & Features, you can sort the list by size. If you add up the programs that you plan on deleting, you'll easily find out if there's enough stuff to add up to 10GB or not.
Use an external hard drive to make a system image first. Pull out the little drive replace it with a big drive then boot to the repair of and restore the image to the big drive after which you can extend the c partition into the raw space left over from drive manager.
Whole operation is about 1 hour you loose no dAta!
You really don't have any option but to upgrade, either to a bigger hard drive (and you will need help moving things from the old drive) or an external hard drive as an add-on. 75 GB is a small drive by today's standards!
Gosh….I believe my first computer had a 40 MB hdd….not 40 GB.
It had an XT with an amber monitor and costs near $1400, and First Choice was my software. That was around…ummm….82-ish?
We have come a long way.
Get an external hard drive and attach it. Or get a bigger internal hard drive installed. The first option is simple and cheaper.
Buy a 1TB USB connected external hard disk.
external drive cheap and plug and play