I firsthand-experienced this in the course of my adventures with Linux. Or more specifically, with what I had to do with my Windows XP.
So at first I was really paranoid about the discontinuation of support for XP (sometime...this year, I think?) Anyway, there I was panicking and shit like that, so I thought there had to be something better than this. I ended up looking to Ubuntu. Which was okay.
But then I thought: how about I install an Ubuntu OS on one partition and use Windows on the other? (For practical, aka Photoshop, purposes.) And maybe I would also increase the size of the second partition because the first one was way too fat. I didn't want to delete anything yet (because I might be a bit of a pack rat, even up to files and stuff) but since my external hard drive was also full of stuff (IDEK I hardly watch anything on that) I didn't have anywhere to back everything up.
I was also lacking a substantial amount of sleep (summer classes ugh) when I tried adjusting the partitions on my drive. That's my excuse. Actually anything will work as long as you read and you backup, but for the love of your device please please backup. And make sure you know how to restore from backups. Yeah.
So I proceeded with partitioning the device all the same, whatever whatever yadda yadda instructions not listening, and so long story short I ended up fail-mounting drive C: of my device and kind of also fail-mounting drive D:. And maybe damaging the Windows XP kernel a bit in the process. For a while it was touch and go with the laptop, I could only use a lowest of the low bootloader for recovery, but I didn't have anything to recover.
Fortunately LiveCD on USB (don't ask me how it work it just does) helped me make sense of the mess, and returned me to glory, via Linux Mint 14 Cinnamon. No Photoshop though, but whatever. There's GIMP, it's...fine, for want of a better term.
So, from that cautionary tale, we now arrive at my current predicament over the Android tablet that I bought for cheap. Not the cheapest available, and I was going to spring for one with a SIM slot but no dice. Boo. Anyway my phone works fine for that, and I don't really want to have a 3G smartphone tablet thingy because I think that would be a big drain on battery resources.
The problem, though, is that the WiFi proxy authentication still sucks. I know now that root is THE option to make the most out of your Android device, but unfortunately there doesn't seem to be much on the development front for a ROM image for this particular model. Maybe I should've just saved up for a Samsung Tab or an iPad mini? They seem to have better support for rooting/jailbreaking options. And Apple devices automatically apply proxy settings, including authentication, universally over the device. That's nice.
I remember back in the days when only my browser could use proxy authenticated WiFi, I had to go looking around for the solution to my OS web connection woes and found myself deeply mired within the sudo world of Linux. So much fun. It felt like a power was being awakened in me. But as it has been said in Spiderman, with great power comes great responsibility.
I don't really like responsibility. I swore to myself that I would swear of responsibility forever if I could. Or just ignore it. Whatever works. But you can't escape it, even if you have developed a fine phobia-escaping-coping mechanism for responsibility wherein you seek it but actively avoid it in continuous situations. And it was a good thing that setting up proxy authentication eventually worked on my system without me having to periodically dig into the etc/conf/ something folder and root access the files and add credentials.
Now, if that were only possible on this tablet. Hm. At one point I was considering building my own ROM for this device just so I could access the App Store. Damnit. I just want proxy authentication to work what is so hard about that? Linux Mint Cinnamon 14 and Android 4.0.4 seem to have this in common. Huh. No accounting for taste, apparently.