Should I Completely Wipe My PC and Reinstall Windows?

Need a bit more info! Is your C drive a separate physical drive or just a partition? If it's a single partition, you might be able to back everything up from D, remove the partition, and expand C. If they’re separate drives, consider getting a larger drive for C and using mirroring software to transfer everything over. Just be prepared for some technical work unless you want to keep it simple and just back up your stuff, switch to a bigger C drive, and reinstall Windows.

If you're okay with the idea, go for it! I usually do a clean wipe on my main computer about once a year, and it definitely helps with performance.

I wipe my laptop and PC every year. The OS itself is just that—an OS! My important data is stored on network-attached storage, but there's always something I find later that I forgot to back up—so don’t forget the little things!

How much space do you have allocated to your C drive? If managed well, the C and D partitioning can actually be beneficial. I've used this setup for years without issues.

You will lose everything not backed up, so you need to weigh how painful that loss might be. Each time I've done it, I've forgotten to save certain encryption keys or saved passwords that turned out to be important later. Just double-check everything before you proceed! Also, I've been in your shoes with a cramped C drive—it's tough, but it’s helpful to set custom locations for installations to manage the space better.