Thanks for all of your help. Yes, indeed the partition set up is left over from a previous conception. Currently, I was looking for the most conservative approach to temporarily solving my space problem. Otherwise I agree that a new drive and a re-installation would be in order. Of course it seems to me the problem with a re-install is that there is no Windows 7 SP2 so I'll spend hours (with my connection) downloading all of the up dates.
Not really necessary at all. All you need to do is migrate your current existing hard drive over to a new larger one. It will be an identical 100% "clone", but with larger capacity partitions or anything you care to reconstruct there.
First, buy yourself an external USB 3.0/2.0 drive if you don't already have one. This drive can be used subsequently for regular automated backups with highly rated and recommended 3rd-party software, both "system image" as well as "data". You can find inexpensive
1TB USB-powered WD MyPassport drives like this one which are suitable for laptops as well as desktops, or for just a bit more money you can find relatively inexpensive
2TB self-powered Verbatim Store 'n' Save drives like this one, or any other similar external drive. Plugs into USB on your PC.
Next, download and install
Macrium Reflect Free software, which is free and is the easiest to use and truly highly regarded "system image" / "cloning" software you'll find. In its non-free "Standard" form (for a modest price) it also provides (a) "data" folder/file backup capability, and (b) automatic space management, i.e. "pruning" of older generations of backup files as you create new ones. Support for regular scheduled automated FULL as well as INCREMENTAL/DIFFERENTIAL backups, for both types "system image" and also "data".
Next, buy your new larger internal drive, whatever new size you want and whatever brand.
Next, plug in the external USB drive to your PC.
Next, use Macrium Reflect to take a "system image" BACKUP of all the partitions on your current 250GB drive, out to a folder on the external USB drive.
Next, create a standalone bootable USB drive "rescue media" version of Macrium Reflect (from its own built-in "Tools"). Or, you can also choose to burn a standalone bootable CD/DVD instead, from the same "rescue media" wizard. Any special USB 3.0 driver required to access your external USB 3.0 drive will be installed on the WinPE bootable media, ensuring that you'll be able to see that external USB 3.0 drive when you boot from this media.
Next, do a hardware swap on your PC, replacing the current 250GB internal drive with your newly purchased one.
Next, boot from the earlier created standalone bootable USB or CD/DVD "rescue media". You'll now be able to do a "system image " RESTORE running WinPE from this bootable media. You should be able to navigate to the external USB 3.0 drive to select the "system image" backup file you just created 15 minutes earlier, and you should be able to see the newly swapped larger internal hard drive you just installed.
Run that "system image" RESTORE. When it completes, remove the bootable "rescue media" (either USB drive or CD/DVD) and re-boot the machine. You should probably enter the BIOS to ensure that your startup boot sequence list shows your newly swapped larger internal hard drive at the proper location in that boot device list, following USB and ATAPI CD/DVD drives. Adjust things as necessary, if necessary.
Now SAVE/EXIT from BIOS and re-boot normally. You should come up absolutely 100% normally but now booted to the exact same currently installed Windows you previously had... but running from your new larger internal hard drive.
Next, if you want to do some partition maintenance, again use
Partition Wizard Free as previously recommended. You will have lots of options now, given the larger new drive.
Next, you can setup regular automated "system image" and "data" folder/file backups (if you invested in Macrium Reflect Standard), going out to your new external USB 3.0 drive. You will not regret this. I, myself, prefer to use
NovaBACKUP from NovaStor for my own "data" backups (really just because I've been using it for many years), but using Macrium Reflect Standard is perfectly fine and if you've already paid for it and are already using it for "system image" backups. Why not use it also for your "data" backups?
Most importantly: you need to be backing up your Windows system ("system image" of the boot drives required to restore 100% bootable Windows integrity in the even of some disaster, or upgrade again to yet another new larger drive) on a regular schedule, say at least weekly. And you also need to be backing up your "data" nightly, i.e. folders/files outside of Windows and programs, in order to protect yourself against loss, corruption, or accidental deletion. I myself run a regular monthly FULL "data" backup for ALL "data" on my entire system, as well as regular nightly INCREMENTAL "data" backup for whatever I worked on in the past 24 hours. I also retain 4 complete monthly generations "sets" (of FULL and INCREMENTAL) going back 4 months, so that if I have to I can recover anything I ever had in any folder/file on any day over the past 4 months.
NOTE: Macrium Reflect also provides a "boot menu" wizard, to add Macrium Reflect to the Boot Manager menu. This allows you to boot the machine, and then select Macrium Reflect to run "standalone" for recovery, here booting standalone from the still-usable workable hard drive instead of having to boot standalone from your USB or CD/DVD media. This assumes the hard drive is still usable and has not crashed, and that you simply would like to restore something from your external USB 3.0 backup drive. This is kind of a "non-fatal" minor recovery, with the current hard drive still usable and bootable. Otherwise, for more serious situations where the drive is no longer usable, you still need to fall back to the USB or CD/DVD "rescue media" standalone boot, like if you had to replace the hard drive again.